N-Terminal Pro-brain Natriuretic Peptide Identifies Patients at High Risk for Adverse Cardiac Outcome after Vascular Surgery
Mahla, Elisabeth M.D.*; Baumann, Anneliese M.D.†; Rehak, Peter Ph.D.‡; Watzinger, Norbert M.D.§; Vicenzi, Martin N. M.D.∥; Maier, Robert M.D.#; Tiesenhausen, Kurt M.D.**; Metzler, Helfried M.D.∥; Toller, Wolfgang M.D.∥
Background: Preoperative N-terminal pro-BNP (NT-proBNP) is independently associated with adverse cardiac outcome but does not anticipate the dynamic consequences of anesthesia and surgery. The authors hypothesized that a single postoperative NT-proBNP level provides additional prognostic information for in-hospital and late cardiac events.
Methods: Two hundred eighteen patients scheduled to undergo vascular surgery were enrolled and followed up for 24–30 months. Logistic regression and Cox proportional hazards model were performed to evaluate predictors of in-hospital and long-term cardiac outcome. The optimal discriminatory level of preoperative and postoperative NT-proBNP was determined by receiver operating characteristic analysis.
Results: During a median follow-up of 826 days, 44 patients (20%) experienced 51 cardiac events. Perioperatively, median NT-proBNP increased from 215 to 557 pg/ml (interquartile range, 83/457 to 221/1178 pg/ml; P < 0.001). The optimum discriminate threshold for preoperative and postoperative NT-proBNP was 280 pg/ml (95% confidence interval, 123–400) and 860 pg/ml (95% confidence interval, 556–1,054), respectively. Adjusted for age, previous myocardial infarction, preoperative fibrinogen, creatinine, high-sensitivity C-reactive protein, type, duration, and surgical complications, only postoperative NT-proBNP remained significantly associated with in-hospital (adjusted hazard ratio, 19.8; 95% confidence interval, 3.4–115) and long-term cardiac outcome (adjusted hazard ratio, 4.88; 95% confidence interval, 2.43–9.81).
Conclusion: A single postoperative NT-proBNP determination provides important additional prognostic information to preoperative levels and may support therapeutic decisions to prevent subsequent structural myocardial damage.
PATIENTS undergoing vascular surgery have a high prevalence of coronary artery disease1
and are at substantial risk for myocardial infarction (MI) and death associated with the occurrence of prolonged perioperative ischemia.2–5
Preoperative risk evaluation and optimized medical stress protection may improve cardiac outcome,3,6,7
whereas withdrawal of medication and difficulties in proper diagnosis of myocardial ischemia and myocardial dysfunction in the postoperative period expose the patient to additional cardiac risk. Therefore, early and reliable postoperative risk stratification is an important issue to identify patients at high cardiac risk and implement appropriate therapy.8
Brain natriuretic peptide (BNP) and its inactive cleavage product N-terminal pro-BNP (NT-proBNP) are released from cardiac myocytes in response to ischemia9
and myocardial stretch.10,11
Plasma levels of these peptides correlate well with the extent of inducible ischemia12–14
and are powerful predictors of death and hospital admission in patients with stable coronary artery disease15,16
and acute coronary syndromes.17–20
In these patients, BNP and NT-proBNP provide prognostic information beyond clinical risk factors, high-sensitivity C-reactive protein (hs-CRP), left ventricular function, and troponins.17,21
In addition, BNP and NT-proBNP are valuable tools in the emergency department to establish the diagnosis of heart failure in patients with acute dyspnea.10,22,23
Despite evidence of their prognostic power for nonsurgical10,19,20,23
and preoperative patients,24–28
the value of postoperative natriuretic peptides as markers of in-hospital and long-term cardiac events currently is unknown. This differentiation between preoperative and postoperative peptide levels is important, because restriction to a single preoperative value does not reflect the variable dynamic consequences of anesthesia and different risk surgery8
exerted by intraoperative and postoperative catecholamine surges29
and hypercoagulability with their potential to precipitate prolonged postoperative ischemia, myocardial necrosis, and myocardial dysfunction after major surgery.2,30
Whether postoperative BNP or NT-proBNP levels indicate myocardial dysfunction and prove as reliable indicators of cardiac stress and outcome is unknown. Because attenuation of perioperative myocardial stress substantially reduces postoperative BNP release after major abdominal surgery29
and also decreases the incidence of myocardial infarctions,31
the question arises whether postoperative BNP or NT-proBNP levels are also associated with early and late cardiac outcome. Considering the longer half-life of NT-proBNP (60–120 min) compared with that of BNP (20 min),32
NT-proBNP may be superior in the perioperative setting although impaired renal function may reduce specificity.33,34
We therefore hypothesized that postoperative NT-proBNP levels provide additional prognostic power for in-hospital and long-term cardiac events when compared with preoperative NT-proBNP levels in patients undergoing elective major surgery.
Materials and Methods
After institutional review board approval (Medical University of Graz, Graz, Austria), all patients scheduled to undergo major elective vascular surgery between October 2002 and June 2003 were screened for eligibility (fig. 1
) for this prospective observational study. All patients gave written informed consent before participating. Patients were included if they had sinus rhythm, had a left ventricular ejection fraction of at least 40%, and were scheduled to undergo elective abdominal aortic aneurysm surgery, infrainguinal arterial reconstruction, or carotid endarterectomy during general anesthesia. Patients with unstable coronary syndromes (acute or recent MI with evidence of important ischemic risk by clinical symptoms or stress testing or unstable or severe angina pectoris8
) or decompensated heart failure (new onset shortness of breath and rales together with echocardiographic evidence of cardiac dysfunction or deterioration of chronic heart failure despite heart failure therapy35
) were excluded. Because chronic atrial fibrillation,36
and impaired renal function33
are associated with increased serum levels of natriuretic peptides, patients with these diagnostic findings were also excluded to reduce possible confounders. Although exact sample size calculation was not feasible because of unknown means/medians and distribution of perioperative NT-proBNP levels in patients with and without cardiovascular events, we expected inclusion of approximately 200 patients during a 9-month period and anticipated a 20% combined event rate.
Before surgery, patients underwent a routine clinical evaluation, including detailed medical history, physical evaluation, routine laboratory tests, 12-lead electrocardiography, and chest radiography. Patients with coronary artery disease who were stable on any chronic antianginal medication proceeded to surgery without further noninvasive testing. Standardized perioperative stress protection with β-blockers was instituted in all patients without chronic β-blocker therapy and continued at least until hospital discharge unless contraindicated due to severe irreversible obstructive airway disease,38
hypotension (systolic blood pressure less than 100 mmHg), or bradycardia (heart rate of 50 beats/min or less).
Determination of Biochemical Markers
Blood samples were collected after 20 min of supine bed rest from an antecubital vein and centrifuged within 60 min. After determination of troponin T serum was frozen and stored in aliquots at −80°C. NT-proBNP and hs-CRP were measured and analyzed after completion of the active inclusion period of the study. Troponin T and NT-proBNP analyses were performed using the Roche Elecsys 2010 (Roche Diagnostics GmbH, Mannheim, Germany).
Troponin T (electrochemiluminescence sandwich immunoassay, Elecsys Troponin T STAT; Roche Diagnostics; 99th percentile of the distribution in healthy population: < 0.01 ng/ml; sensitivity: 0.01 ng/ml; intraassay and interassay coefficients of variance: < 5%; cutoff: 0.03 ng/ml) was determined on the day before surgery, on postoperative day 1, once between postoperative days 3 and 5, on the day of hospital discharge, and whenever clinically indicated by signs and symptoms of myocardial ischemia or surgical complications.
NT-proBNP determinations (electrochemiluminescence sandwich immunoassay, Elecsys ProBNP; Roche Diagnostics; sensitivity: 5 pg/ml, intraassay and interassay coefficients of variance: < 3%) were performed on the day before surgery and once between postoperative days 3 and 5. Because at this time most patients no longer receive intravenous infusion therapy, a possible influence of increased filling pressures on NT-proBNP levels was diminished.23
Hs-CRP (particle-enhanced immunonephelometry, CardioPhase hs-CRP; Dade Behring GmbH, Marburg, Germany; sensitivity: 0.175 mg/l; intraassay and interassay coefficient of variation: < 5%) was determined preoperatively.
Serial 12-lead electrocardiogram recordings were performed on the day before surgery, once between postoperative days 3 and 5, and whenever clinically indicated.
Standard two-dimensional, M-mode and Doppler echocardiography (GE Vingmed; System Five, Holten, Norway) was performed by a cardiologist in all patients on the day before surgery, and postoperatively in case of a troponin T greater than 0.03 ng/ml and a nondiagnostic electrocardiogram, and whenever clinically indicated to diagnose heart failure and to guide therapeutic interventions. Parasternal long- and short-axis views and apical two-, three-, and four-chamber views were obtained for the assessment of left ventricular ejection fraction. Anesthetic management, perioperative care, and intensive care unit referral were at the discretion of the attending physicians. Preoperative β-blockers and statins were reassumed postoperatively either orally or via nasogastric tube. Postoperative analgesia was performed using intravenous infusions of 0.1–0.2 mg/kg piritramide four to six times daily, supplemented by intravenous nonsteroidal antiinflammatory drugs (75 mg diclofenac and 30 mg orphenadrincitrat; Neodolpasse®; Fresenius Kabi, Austria GmbH, Graz, Austria) twice daily. The analgesic regimen was adjusted to achieve a visual analog scale score of 3 or less and was adjusted by the physicians from the acute pain service.
Perioperative anticoagulation was standardized: Intraoperatively, all patients received unfractionated heparin (30 U/kg intravenously) before vascular clamping but did not receive protamine after vascular declamping. In patients undergoing carotid endarterectomy or infrainguinal bypass surgery, chronic antiaggregatory therapy with aspirin or clopidogrel was maintained perioperatively. In contrast, in patients undergoing elective abdominal aortic aneurysm surgery, chronic antiaggregatory medication was discontinued 5–7 days preoperatively, replaced with low-molecular-weight heparin, and reassumed on postoperative day 3 when justified by uneventful clinical course. In case of postoperative MI, patients received heparin (1 mg/kg enoxaparin twice daily or unfractionated heparin titrated to an activated partial thromboplastin time of 1.5 normal) and clopidogrel (300-mg bolus, continued by 75 mg/day), unless contraindicated by an increased risk of bleeding.
The perioperative hematocrit was maintained between 30% and 33%. The attending physicians were aware of the patients' perioperative echocardiographic data and troponin T levels but were unaware of NT-proBNP levels. During hospitalization, a study protocol and the patients' records were used for data documentation and collection.
Patients were monitored for in-hospital and long-term cardiac events. The primary outcome variable was a combined endpoint of nonfatal MI, emergent coronary artery revascularization, or cardiac death after index surgery. In case of two or more cardiac events, the first event was considered the endpoint of interest. The planned long-term follow-up was performed at 24–30 months after index surgery and included a telephone interview conducted by an investigator unaware of the patients' history and the aim of the study. In case of hospital readmission or death since index surgery, hospital charts, death certificates, and autopsy reports were reviewed. In addition, time, number, and cause of noncardiac deaths were recorded. Nonfatal MI
was diagnosed by a typical increase and decrease of troponin T to greater than 0.03 ng/ml together with clinical signs, symptoms, or electrocardiographic or echocardiographic findings that suggest the presence of acute myocardial ischemia.39 Acute coronary revascularization
was defined as acute percutaneous transluminal coronary angioplasty/stenting or coronary artery bypass grafting due to persistent myocardial ischemia and hemodynamic compromise refractory to medical therapy. Cardiac death
was defined as death secondary to myocardial infarction, arrhythmia or heart failure.
All data were tested for normal distribution by Shapiro–Wilk test. Results are presented as mean ± SD, medians and interquartile range [25th–75th percentile], or absolute and relative frequencies as appropriate. Preoperative NT-proBNP values as well as their perioperative changes were compared by Mann–Whitney U test. To identify the best discriminatory level of NT-proBNP associated with the primary endpoint, receiver operating characteristic curves were analyzed, and the best cutoff was defined as a value providing equal sensitivity and specificity. The 95% confidence interval (CI) for the best threshold was determined by TG-ROC software (Matthias Greiner, Institute for Parasitology and Tropical Veterinary Medicine, Freie Universitaet Berlin, Berlin, Germany).40
Sensitivity, specificity, and positive and negative predictive values were calculated. To assess event-free survival, a Kaplan–Meier analysis was performed. The event–time curve was separated into two curves according to the discriminatory postoperative NT-proBNP, and these curves were compared by log-rank test. Univariate comparisons between patients with and without events were performed using the chi-square test, Fisher exact test, Mann–Whitney U test, or Student t
test as appropriate. Variables with P
values below 0.25 in the univariate analysis were entered by stepwise forward selection in a multivariate Cox proportional hazards model. Subgroup analysis of in-hospital events was performed by logistic regression analysis. The level of significance was set at a two-tailed P
value less than 0.05. The statistical software package NCSS 2004 (NCSS, Kaysville, UT) was used for analysis.
The patient flow through the study is shown in figure 1
. Baseline characteristics of the 218 included patients, troponin T, and NT-proBNP levels (preoperative and postoperative) are presented in table 1
. No patient had coronary artery stenting less than 1 yr preoperatively. Ninety-six percent of the patients were successfully extubated in the operating room, and 3% were extubated within the first 24 h postoperatively. Two patients required prolonged ventilation for 5 and 6 days, respectively, because of respiratory insufficiency.
During a median follow-up of 826 days (interquartile range, 684–1,063), 44 patients (20%) experienced a total of 51 cardiac events, including 32 nonfatal myocardial infarctions (15%), 3 acute coronary revascularizations (1%), and 16 cardiac deaths (7%). Overall mortality (cardiac and noncardiac) was 14%, including 8 cases of cancer, 5 cases of sepsis, and 1 accident. Nineteen patients sustained in-hospital myocardial infarctions.
Association of Perioperative NT-proBNP and Cardiovascular Events
Median NT-proBNP increased significantly from 215 to 557 pg/ml (interquartile range, 83/457 to 221/1178 pg/ml; P
< 0.001). Preoperatively, median NT-proBNP levels were higher in patients who experienced postoperative cardiovascular events as compared with event-free patients (551 vs.
179 pg/ml; P
< 0.001). In addition, the median perioperative NT-proBNP increase was greater in patients sustaining cardiovascular events as compared with those event free (609 vs.
183 pg/ml; P
< 0.001; fig. 2
The association of postoperative NT-proBNP and cardiovascular events was assessed with a receiver operating characteristic curve (fig. 3
). The area under the curve was 0.80 (95% CI, 0.72–0.87) for postoperative NT-proBNP. The optimum discriminate threshold for postoperative NT-proBNP was 860 pg/ml (95% CI, 556–1,054), yielding a sensitivity of 73%, a specificity of 71%, a positive predictive value of 39%, and a negative predictive value of 86% (positive likelihood ratio: 2.53). In univariate analysis, a postoperative NT-proBNP exceeding 860 pg/ml was associated with a 5.3-fold (95% CI, 2.8- to 10.4-fold) relative risk of adverse cardiac events. Conversely, for preoperative NT-proBNP, the area under the curve was 0.74 (95% CI, 0.64–0.82), and the optimum discriminate threshold of 280 pg/ml (95% CI, 123–400) was associated with a 4.1-fold (95% CI, 2.1- to 7.9-fold) relative risk for adverse cardiac events in the univariate analysis. The occurrence of cardiac events over time is depicted in a Kaplan–Meier event–time curve (fig. 4A
). Separating the initial event–time curve of figure 4A
by the two levels of postoperative NT-proBNP (< 860 pg/ml and ≥ 860 pg/ml) demonstrates the association of postoperative NT-proBNP levels and cumulative event rate (fig. 4B
). The separation of the event–time curve occurred early, indicating a different risk a priori
that persists until late follow-up. Age, previous MI, preoperative fibrinogen, preoperative creatinine, preoperative hs-CRP greater than 3 mg/l, abdominal aortic aneurysm resection, duration of surgery, and surgical complications were significantly associated with adverse cardiac events in the univariate analysis (table 1
). Adjusted for these univariate correlates by Cox proportional hazard model, postoperative but not preoperative NT-proBNP remained significantly and independently associated with adverse cardiac events (table 2
). Similarly, in a subgroup analysis, only postoperative NT-proBNP remained significantly and independently associated with in-hospital cardiac events after adjustment for the above univariate correlates by logistic regression analysis (table 3
In patients undergoing vascular surgery, compromised coronary perfusion and perioperative stress may precipitate prolonged postoperative myocardial ischemia and dysfunction, which adversely affect prognosis.2,4,30
Therefore, early diagnosis, risk stratification, and modification are essential.8
In the nonsurgical setting, BNP and NT-proBNP are equally powerful diagnostic and prognostic markers in patients with heart failure and coronary artery disease,10,15–17,19,20,22,34,41,42
although BNP is considered superior to NT-proBNP in elderly patients with impaired renal function.33,34
Perioperatively, however, determination of NT-proBNP may be preferred in patients with preserved renal function because of a longer half-life and a lower susceptibility to the rapid hemodynamic changes adherent with anesthesia and surgery.
The results of the current investigation in patients undergoing vascular surgery demonstrate the prognostic value of a single postoperative NT-proBNP determination for adverse in-hospital and long-term cardiac outcome. In addition, the study also confirms the rationale of preoperative NT-proBNP determination,25,27,28
because patients with higher initial NT-proBNP also had higher postoperative NT-proBNP elevations and sustained substantially more cardiovascular complications during 3 yr of follow-up as compared with patients with lower NT-proBNP levels.
The value of perioperative assessment of brain natriuretic peptides is incompletely evaluated. In patients undergoing vascular and noncardiac surgery, several recent studies demonstrated the prognostic superiority of preoperative BNP24,26
and NT-proBNP levels,25,27,28
as compared with traditional cardiac risk factors. Furthermore, Feringa et al.27,28
recently suggested that preoperative NT-proBNP outweighs the prognostic power of inducible ischemia for in-hospital27
and long-term cardiac events.28
In contrast, the role of postoperative BNP determination is less clear. Postoperatively elevated BNP levels indicated increased right ventricular afterload in patients after thoracic surgery.43
In addition, Suttner et al.29
demonstrated substantial BNP elevations lasting for at least 72 h after major abdominal surgery that were attenuated by continuous intraoperative and postoperative thoracic epidural analgesia. Although the substantial postoperative BNP elevations in latter two studies29,43
suggest myocardial impairment, neither was designed to address diagnostic and prognostic value for adverse cardiac outcome.
The current investigation extends these findings by demonstrating for the first time that elevated postoperative NT-proBNP levels are associated with a substantially increased risk of adverse cardiac outcome after vascular surgery and that postoperative determination of this parameter helps in identifying patients at risk. When selecting a postoperative NT-proBNP cutoff of 860 pg/ml, 90% of the patients with NT-proBNP levels below this value remained free from cardiac events, whereas 50% of patients equal to or above this level sustained a cardiovascular event. In a subsequent multivariate analysis that was adjusted for well-known clinical and biochemical outcome predictors and surgical specifics,3,5,44–47
a high postoperative NT-proBNP level remained an independent prognostic marker associated with 20- and 5-fold increases of in-hospital and long-term adverse cardiac events, respectively.
Other multivariate predictors of adverse cardiovascular outcome included preoperative creatinine levels and postoperative surgical complications. The association between cardiac complications and surgical complications has been demonstrated previously48
and emphasizes the impact of the dynamic postoperative period on cardiac outcome. In contrast, preoperative hs-CRP added no incremental prognostic power in the current investigation, a finding that is discordant with the cardiologic literature49
and with a previous investigation evaluating preoperative risk factors for adverse cardiac outcome in patients undergoing vascular surgery.47
Although our study and others29,43
consistently demonstrate high postoperative BNP and NT-proBNP levels after major surgery in high-risk patients, the reasons for these elevations remain speculative. BNP and NT-proBNP are expressed from cardiac myocytes to reduce ventricular wall stress in ischemic and nonischemic ventricles. It is therefore attractive to speculate that a postoperative increase of NT-proBNP reflects an impaired ischemic or nonischemic cardiac performance with a prognostic power beyond that of a single preoperative determination because it incorporates the dynamic intraoperative and postoperative stress exposure. Notably, a correlation between prestress and poststress levels of BNP and NT-proBNP and the risk and extent of inducible ischemia has been demonstrated previously, in both the nonsurgical setting12–14
and the noninvasive risk stratification before vascular surgery.27,28
Although currently no consensus exists regarding the reference range of NT-proBNP values, we identified 860 pg/ml as the optimal postoperative NT-proBNP level associated with adverse in-hospital and long-term cardiac events. Our findings therefore suggest incorporation of NT-proBNP determinations in the diagnostic procedure both before and after surgery in high-risk patients. In accord with our results, patients with high preoperative levels of BNP24,26
sustained increased postoperative cardiac complications, indicating an elevated baseline risk. In contrast, early recognition of prolonged postoperative ischemia or heart failure is challenging in routine clinical practice,2,35
because ischemia often presents silent in this period and is frequently skewed by parallel administration of analgetics or dyspnea of pulmonary origin. In the setting of major vascular surgery, postoperative NT-proBNP levels above 860 pg/ml were associated with substantially higher cardiac events that occurred earlier and more frequently as compared with patients with lower levels of this parameter. Therefore, determination of this parameter adds incremental prognostic information and may guide early therapeutic decisions by addressing both anti-ischemic and heart failure therapy.
The results of this investigation must be interpreted with the constraints of several possible limitations. First, the overall adverse event rate in our study was 20%, which is somewhat less than that reported in the recent literature.5,45,46
Because of the advanced age and the comorbidity of patients presenting for vascular surgery, we suspected a substantial proportion of noncardiac deaths before starting the study and therefore, in contrast to others,5,45,46
only included cardiac death in the combined endpoint. In fact, almost half of our patients died of noncardiac causes. Second, several additional factors, including volume therapy23
may influence postoperative NT-proBNP levels. Therefore, we tried to eliminate these possible confounders by a standardized β-blockade, pain management, and determination on postoperative days 3–5, when patients are usually no longer receiving infusion therapy. However, because of the single postoperative measurement of NT-proBNP, we cannot determine whether the elevation of NT-proBNP between postoperative days 3 and 5 reflects the maximum increase of this parameter. Although there are age-dependent cutoffs for establishing the diagnosis of heart failure,10,35,42,50
there are currently no such cutoffs for establishing postoperative prognosis. Because of the minimal, although statistically significant, difference in age between patients with and without events, we did not adjust NT-proBNP cutoff for increasing age. The discriminate value of 860 pg/ml in our study, however, is comparable with NT-proBNP levels associated with a 7- to 10-fold increased risk of short- and long-term mortality in patients presenting with acute coronary syndromes17
but refers only to patients with preoperatively preserved renal function. In patients with impaired renal function, the diagnostic properties of NT-proBNP have been demonstrated to be less accurate when compared with those of BNP.34
Third, we do not know whether NT-proBNP declined or returned to preoperative baseline values. This might be important because recent cardiologic investigations demonstrated that NT-proBNP level measured during a chronic, relatively stable phase is a better predictor of long-term cardiac outcome than that obtained during the acute, unstable phase.19
Fourth, we only included patients with a preoperatively preserved ejection fraction of greater than 40%. Although this does not exclude heart failure, our study does not address high-risk patients51
who might particularly benefit from early NT-proBNP determinations and subsequent therapeutic consequences.
In conclusion, a single postoperative NT-proBNP determination provides important additional prognostic information to preoperative levels and may support early therapeutic decisions to prevent subsequent structural myocardial damage, which ultimately leads to in-hospital and long-term cardiac complications. Further studies in larger patient populations are required to establish age-adjusted cutoffs of brain natriuretic peptides and to compare perioperative diagnostic and prognostic properties of BNP and NT-proBNP, particularly with respect to the substantial incidence of renal dysfunction in cardiac risk patients.
1. Hertzer NR, Beven EG, Young JR, O'Hara PJ, Ruschhaupt WF III, Graor RA, Dewolfe VG, Maljovec LC: Coronary artery disease in peripheral vascular patients: A classification of 1000 coronary angiograms and results of surgical management. Ann Surg 1984; 199:223–33
2. Landesberg G, Mosseri M, Zahger D, Wolf Y, Perouansky M, Anner H, Drenger B, Hasin Y, Berlatzky Y, Weissman C: Myocardial infarction after vascular surgery: The role of prolonged stress-induced, ST depression-type ischemia. J Am Coll Cardiol 2001; 37:1839–45
3. Boersma E, Poldermans D, Bax JJ, Steyerberg EW, Thomson IR, Banga JD, van De Ven LL, van Urk H, Roelandt JR: Predictors of cardiac events after major vascular surgery: Role of clinical characteristics, dobutamine echocardiography, and beta-blocker therapy. JAMA 2001; 285:1865–73
4. Le Manach Y, Perel A, Coriat P, Godet G, Bertrand M, Riou B: Early and delayed myocardial infarction after abdominal aortic surgery. Anesthesiology 2005; 102:885–91
5. Bursi F, Babuin L, Barbieri A, Politi L, Zennaro M, Grimaldi T, Rumolo A, Gargiulo M, Stella A, Modena MG, Jaffe AS: Vascular surgery patients: perioperative and long-term risk according to the ACC/AHA guidelines, the additive role of post-operative troponin elevation. Eur Heart J 2005; 26:2448–56
6. Schouten O, Shaw LJ, Boersma E, Bax JJ, Kertai MD, Feringa HH, Biagini E, Kok NF, Urk HV, Elhendy A, Poldermans D: A meta-analysis of safety and effectiveness of perioperative beta-blocker use for the prevention of cardiac events in different types of noncardiac surgery. Coron Artery Dis 2006; 17:173–9
7. Poldermans D, Bax JJ, Schouten O, Neskovic AN, Paelinck B, Rocci G, van Dortmont L, Durazzo AE, van de Ven LL, van Sambeek MR, Kertai MD, Boersma E: Should major vascular surgery be delayed because of preoperative cardiac testing in intermediate-risk patients receiving beta-blocker therapy with tight heart rate control? J Am Coll Cardiol 2006; 48:964–9
8. Eagle KA, Berger PB, Calkins H, Chaitman BR, Ewy GA, Fleischmann KE, Fleisher LA, Froehlich JB, Gusberg RJ, Leppo JA: ACC/AHA guideline update for perioperative cardiovascular evaluation for noncardiac surgery—executive summary: A report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines. J Am Coll Cardiol 2002; 39:542–53
9. Goetze JP, Gore A, Moller CH, Steinbruchel DA, Rehfeld JF, Nielsen LB: Acute myocardial hypoxia increases BNP gene expression. FASEB J 2004; 18:1928–30
10. Maisel AS, Krishnaswamy P, Nowak RM, McCord J, Hollander JE, Duc P, Omland T, Storrow AB, Abraham WT, Wu AHB, Clopton P, Steg PG, Westheim A, Knudsen CW, Perez A, Kazanegra R, Herrmann HC, McCullough PA, the Breathing Not Properly Multinational Study Investigators: Rapid measurement of B-type natriuretic peptide in the emergency diagnosis of heart failure. N Engl J Med 2002; 347:161–7
11. Provenchere S, Berroeta C, Reynaud C, Baron G, Poirier I, Desmonts JM, Iung B, Dehoux M, Philip I, Benessiano J: Plasma brain natriuretic peptide and cardiac troponin I concentrations after adult cardiac surgery: Association with postoperative cardiac dysfunction and 1-year mortality. Crit Care Med 2006; 34:995–1000
12. Bibbins-Domingo K, Ansari M, Schiller NB, Massie B, Whooley MA: B-type natriuretic peptide and ischemia in patients with stable coronary disease: Data from the Heart and Soul study. Circulation 2003; 108:2987–92
13. Sabatine MS, Morrow DA, de Lemos JA, Omland T, Desai MY, Tanasijevic M, Hall C, McCabe CH, Braunwald E: Acute changes in circulating natriuretic peptide levels in relation to myocardial ischemia. J Am Coll Cardiol 2004; 44:1988–95
14. Staub D, Jonas N, Zellweger MJ, Nusbaumer C, Wild D, Pfisterer ME, Mueller-Brand J, Perruchoud AP, Mueller C: Use of N-terminal pro-B-type natriuretic peptide to detect myocardial ischemia. Am J Med 2005; 118:1287.e9–16
15. Richards M, Nicholls MG, Espiner EA, Lainchbury JG, Troughton RW, Elliott J, Frampton CM, Crozier IG, Yandle TG, Doughty R, MacMahon S, Sharpe N: Comparison of B-type natriuretic peptides for assessment of cardiac function and prognosis in stable ischemic heart disease. J Am Coll Cardiol 2006; 47:52–60
16. Kragelund C, Gronning B, Kober L, Hildebrandt P, Steffensen R: N-terminal pro-B-type natriuretic peptide and long-term mortality in stable coronary heart disease. N Engl J Med 2005; 352:666–75
17. Jernberg T, Stridsberg M, Venge P, Lindahl B: N-terminal pro brain natriuretic peptide on admission for early risk stratification of patients with chest pain and no ST-segment elevation. J Am Coll Cardiol 2002; 40:437–45
18. De Lemos JA, Morrow DA, Bentley JH, Omland T, Sabatine MS, McCabe CH, Hall C, Cannon CP, Braunwald E: The prognostic value of B-type natriuretic peptide in patients with acute coronary syndromes. N Engl J Med 2001; 345:1014–21
19. Lindahl B, Lindback J, Jernberg T, Johnston N, Stridsberg M, Venge P, Wallentin L: Serial analyses of N-terminal pro-B-type natriuretic peptide in patients with non-ST-segment elevation acute coronary syndromes: A Fragmin and fast Revascularisation during In Stability in Coronary artery disease (FRISC)-II substudy. J Am Coll Cardiol 2005; 45:533–41
20. Morrow DA, de Lemos JA, Blazing MA, Sabatine MS, Murphy SA, Jarolim P, White HD, Fox KA, Califf RM, Braunwald E: Prognostic value of serial B-type natriuretic peptide testing during follow-up of patients with unstable coronary artery disease. JAMA 2005; 294:2866–71
21. Mega JL, Morrow DA, De Lemos JA, Sabatine MS, Murphy SA, Rifai N, Gibson CM, Antman EM, Braunwald E: B-type natriuretic peptide at presentation and prognosis in patients with ST-segment elevation myocardial infarction: An ENTIRE-TIMI-23 substudy. J Am Coll Cardiol 2004; 44:335–9
22. Lainchbury JG, Campbell E, Frampton CM, Yandle TG, Nicholls MG, Richards AM: Brain natriuretic peptide and N-terminal brain natriuretic peptide in the diagnosis of heart failure in patients with acute shortness of breath. J Am Coll Cardiol 2003; 42:728–35
23. Maisel A: The coming of age of natriuretic peptides: The emperor does have clothes! J Am Coll Cardiol 2006; 47:61–4
24. Berry C, Kingsmore D, Gibson S, Hole D, Morton JJ, Byrne D, Dargie HJ: Predictive value of plasma brain natriuretic peptide for cardiac outcome after vascular surgery. Heart 2006; 92:401–2
25. Yeh HM, Lau HP, Lin JM, Sun WZ, Wang MJ, Lai LP: Preoperative plasma N-terminal pro-brain natriuretic peptide as a marker of cardiac risk in patients undergoing elective non-cardiac surgery. Br J Surg 2005; 92:1041–5
26. Dernellis JM, Panaretou MP: Assessment of cardiac risk before noncardiac surgery: Brain natriuretic peptide in 1590 patients. Heart 2006; 92:1645–50
27. Feringa HH, Bax JJ, Elhendy A, de Jonge R, Lindemans J, Schouten O, van den Meiracker AH, Boersma E, Schinkel AF, Kertai MD, van Sambeek MR, Poldermans D: Association of plasma N-terminal pro-B-type natriuretic peptide with postoperative cardiac events in patients undergoing surgery for abdominal aortic aneurysm or leg bypass. Am J Cardiol 2006; 98:111–5
28. Feringa HH, Schouten O, Dunkelgrun M, Bax JJ, Boersma E, Elhendy A, de Jonge R, Karagiannis SE, Vidakovic R, Poldermans D: Plasma N-terminal pro-B-type natriuretic peptide as long-term prognostic marker after major vascular surgery. Heart 2006; 93:226–31
29. Suttner S, Lang K, Piper SN, Schultz H, Rohm KD, Boldt J: Continuous intra- and postoperative thoracic epidural analgesia attenuates brain natriuretic peptide release after major abdominal surgery. Anesth Analg 2005; 101:896–903
30. Lopez-Jimenez F, Goldman L, Sacks DB, Thomas EJ, Johnson PA, Cook EF, Lee TH: Prognostic value of cardiac troponin T after noncardiac surgery: 6-month follow-up data. J Am Coll Cardiol 1997; 29:1241–5
31. Beattie WS, Badner NH, Choi P: Epidural analgesia reduces postoperative myocardial infarction: A meta-analysis. Anesth Analg 2001; 93:853–8
32. Hammerer-Lercher A, Puschendorf B, Mair J: Cardiac natriuretic peptides: New laboratory parameters in heart failure patients. Clin Lab 2001; 47:265–77
33. Luchner A, Hengstenberg C, Lowel H, Trawinski J, Baumann M, Riegger GAJ, Schunkert H, Holmer S: N-terminal pro-brain natriuretic peptide after myocardial infarction: A marker of cardio-renal function. Hypertension 2002; 39:99–104
34. Ray P, Arthaud M, Birolleau S, Isnard R, Lefort Y, Boddaert J, Riou B: Comparison of brain natriuretic peptide and probrain natriuretic peptide in the diagnosis of cardiogenic pulmonary edema in patients aged 65 and older. J Am Geriatr Soc 2005; 53:643–8
35. Remme WJ, Swedberg K: Guidelines for the diagnosis and treatment of chronic heart failure. Eur Heart J 2001; 22:1527–60
36. Silvet H, Young-Xu Y, Walleigh D, Ravid S: Brain natriuretic peptide is elevated in outpatients with atrial fibrillation. Am J Cardiol 2003; 92:1124–7
37. Qi W, Mathisen P, Kjekshus J, Simonsen S, Bjornerheim R, Endresen K, Hall C: Natriuretic peptides in patients with aortic stenosis. Am Heart J 2001; 142:725–32
38. Salpeter SR, Ormiston TM, Salpeter EE: Cardioselective beta-blockers in patients with reactive airway disease: A meta-analysis. Ann Intern Med 2002; 137:715–25
39. Luepker RV, Apple FS, Christenson RH, Crow RS, Fortmann SP, Goff D, Goldberg RJ, Hand MM, Jaffe AS, Julian DG, Levy D, Manolio T, Mendis S, Mensah G, Pajak A, Prineas RJ, Reddy KS, Roger VL, Rosamond WD, Shahar E, Sharrett AR, Sorlie P, Tunstall-Pedoe H: Case definitions for acute coronary heart disease in epidemiology and clinical research studies: A statement from the AHA Council on Epidemiology and Prevention; AHA Statistics Committee; World Heart Federation Council on Epidemiology and Prevention; the European Society of Cardiology Working Group on Epidemiology and Prevention; Centers for Disease Control and Prevention; and the National Heart, Lung, and Blood Institute. Circulation 2003; 108:2543–9
40. Greiner M: Two-graph receiver operating characteristic (TG-ROC): A Microsoft-EXCEL template for the selection of cut-off values in diagnostic tests. J Immunol Methods 1995; 185:145–6
41. Doust JA, Pietrzak E, Dobson A, Glasziou P: How well does B-type natriuretic peptide predict death and cardiac events in patients with heart failure: Systematic review. BMJ 2005; 330:625
42. Ray P, Arthaud M, Lefort Y, Birolleau S, Beigelman C, Riou B: Usefulness of B-type natriuretic peptide in elderly patients with acute dyspnea. Intensive Care Med 2004; 30:2230–6
43. Tayama K, Takamori S, Mitsuoka M, Hayashi A, Tamura K, Mifune H, Shirouzu K: Natriuretic peptides after pulmonary resection. Ann Thorac Surg 2002; 73:1582–6
44. Kim LJ, Martinez EA, Faraday N, Dorman T, Fleisher LA, Perler BA, Williams GM, Chan D, Pronovost PJ: Cardiac troponin I predicts short-term mortality in vascular surgery patients. Circulation 2002; 106:2366–71
45. Landesberg G, Shatz V, Akopnik I, Wolf YG, Mayer M, Berlatzky Y, Weissman C, Mosseri M: Association of cardiac troponin, CK-MB, and postoperative myocardial ischemia with long-term survival after major vascular surgery. J Am Coll Cardiol 2003; 42:1547–54
46. McFalls EO, Ward HB, Moritz TE, Goldman S, Krupski WC, Littooy F, Pierpont G, Santilli S, Rapp J, Hattler B, Shunk K, Jaenicke C, Thottapurathu L, Ellis N, Reda DJ, Henderson WG: Coronary-artery revascularization before elective major vascular surgery. N Engl J Med 2004; 351:2795–804
47. Rossi E, Biasucci LM, Citterio F, Pelliccioni S, Monaco C, Ginnetti F, Angiolillo DJ, Grieco G, Liuzzo G, Maseri A: Risk of myocardial infarction and angina in patients with severe peripheral vascular disease: Predictive role of C-reactive protein. Circulation 2002; 105:800–3
48. Fleischmann KE, Goldman L, Young B, Lee TH: Association between cardiac and noncardiac complications in patients undergoing noncardiac surgery: Outcomes and effects on length of stay. Am J Med 2003; 115:515–20
49. Sabatine MS, Morrow DA, de Lemos JA, Gibson CM, Murphy SA, Rifai N, McCabe C, Antman EM, Cannon CP, Braunwald E: Multimarker approach to risk stratification in non-ST elevation acute coronary syndromes: Simultaneous assessment of troponin I, C-reactive protein, and B-type natriuretic peptide. Circulation 2002; 105:1760–3
50. Raymond I, Groenning BA, Hildebrandt PR, Nilsson JC, Baumann M, Trawinski J, Pedersen F: The influence of age, sex and other variables on the plasma level of N-terminal pro brain natriuretic peptide in a large sample of the general population. Heart 2003; 89:745–51
51. Hernandez AF, Whellan DJ, Stroud S, Sun JL, O'Connor CM, Jollis JG: Outcomes in heart failure patients after major noncardiac surgery. J Am Coll Cardiol 2004; 44:1446–53
This article has been cited 20 time(s).
Journal of Vascular SurgeryB-type natriuretic peptide predicts postoperative cardiac events and mortality after elective open abdominal aortic aneurysm repairJournal of Vascular Surgery
American Heart JournalHow to prevent perioperative myocardial injury: The conundrum continuesAmerican Heart Journal
Anesthesia and AnalgesiaA Preliminary Report on the Prognostic Significance of Preoperative Brain Natriuretic Peptide and Postoperative Cardiac Troponin in Patients Undergoing Major Vascular SurgeryAnesthesia and Analgesia
AnaesthesiaA meta-analysis of the utility of pre-operative brain natriuretic peptide in predicting early and intermediate-term mortality and major adverse cardiac events in vascular surgical patientsAnaesthesia
AnaesthesiaA meta-analysis of the utility of C-reactive protein in predicting early, intermediate-term and long term mortality and major adverse cardiac events in vascular surgical patientsAnaesthesia
Journal of Cardiothoracic and Vascular AnesthesiaN-Terminal B-Natriuretic Peptide After Coronary Artery Bypass Graft SurgeryJournal of Cardiothoracic and Vascular Anesthesia
Journal of Thoracic and Cardiovascular SurgeryPreoperative B-type natriuretic peptide is as independent predictor of ventricular dysfunction and mortality after primary coronary artery bypass graftingJournal of Thoracic and Cardiovascular Surgery
Journal of Vascular SurgeryN-terminal pro B-type natriuretic peptide is an independent predictor of postoperative myocardial injury in patients undergoing major vascular surgeryJournal of Vascular Surgery
AnaesthesiaB type natriuretic peptide - a diagnostic breakthrough in peri-operative cardiac risk assessment?Anaesthesia
British Journal of AnaesthesiaPreoperative plasma brain natriuretic peptide concentrations: do they improve our care of high-risk non-cardiac surgical patients?British Journal of Anaesthesia
Journal of the American College of CardiologyIs a Pre-Operative Brain Natriuretic Peptide or N-Terminal Pro-B-Type Natriuretic Peptide Measurement an Independent Predictor of Adverse Cardiovascular Outcomes Within 30 Days of Noncardiac Surgery? A Systematic Review and Meta-Analysis of Observational StudiesJournal of the American College of Cardiology
British Journal of AnaesthesiaN-terminal fragment of pro-B-type natriuretic peptide is a predictor of cardiac events in high-risk patients undergoing acute hip fracture surgeryBritish Journal of Anaesthesia
British Journal of AnaesthesiaRole of N-terminal pro B-type natriuretic peptide in identifying patients at high risk for adverse outcome after emergent non-cardiac surgeryBritish Journal of Anaesthesia
Arquivos Brasileiros De CardiologiaPrognostic Value of Perioperative N-Terminal Pro-B-Type Natriuretic Peptide in Noncardiac SurgeryArquivos Brasileiros De Cardiologia
AnesthesiologyThe Future for B-type Natriuretic Peptide in Preoperative AssessmentAnesthesiology
AnesthesiologyThe Future for B-type Natriuretic Peptide in Preoperative AssessmentAnesthesiology
© 2007 American Society of Anesthesiologists, Inc.
Publication of an advertisement in Anesthesiology Online does not constitute endorsement by the American Society of Anesthesiologists, Inc. or Lippincott Williams & Wilkins, Inc. of the product or service being advertised.