Aortic valve replacement is a high-risk surgery (3%–5%, 30-day mortality) performed on approximately 30,000 elderly patients a year in the United States. Currently, preoperative risk assessment is based on a composite of medical examination and a subjective evaluation for frailty (“eyeball test”). Objective frailty assessment using validated indices has the potential to improve risk stratification. The purpose of this study was to (1) establish whether frailty can predict 30-day mortality and composite morbidity in patients undergoing aortic valve replacement and (2) compare the predictive ability of 3 frailty indices in this population.
This study was a retrospective cohort study of 3088 patients 65 years old and older undergoing aortic valve replacement surgery (based on current procedure terminology codes) between the years 2006 and 2012 extracted from the American College of Surgeons National Surgical Quality Improvement Program database. Frailty was assessed using the modified frailty index, risk analysis index, and Ganapathi indices. Outcomes measured were 30-day mortality and composite morbidity (myocardial infarction, cardiac arrest, pulmonary embolism, pneumonia, reintubation, renal insufficiency, coma >24 hours, urinary tract infections, sepsis, deep vein thrombosis, deep wound surgical site infection, superficial site infection, and reoperation).
Frailty was a better predictor of mortality than morbidity, and it was not markedly different among any of the 3 indices. Frailty was associated with an increased risk of 30-day mortality and longer lengths of stay.
Frailty can predict mortality in patients undergoing aortic valve replacement. Choice of frailty index does not make a difference in this patient population.
Supplemental Digital Content is available in the text.Published ahead of print August 29, 2017.
From the Departments of *Anesthesiology and †Population Health Science and Policy and Anesthesiology, Icahn School of Medicine at Mount Sinai, New York, New York; ‡Division of Vascular Surgery and Endovascular Therapy, Department of Surgery, Emory University School of Medicine, Atlanta, Georgia; and §Departments of Anesthesiology, Neurosurgery, Geriatrics & Palliative Care, Icahn School of Medicine at Mount Sinai, New York, New York.
Published ahead of print August 29, 2017.
Accepted for publication July 6, 2017.
Funding: This study was supported by the K23 AG17-015 (S.D.) National Institute on Aging, Optimizing postoperative cognition in the elderly, American Federation of Aging (AFAR) Beeson Scholar Program (S.D.).
The authors declare no conflicts of interest.
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Address correspondence to Gary Esses, MD, Department of Anesthesiology, Icahn School of Medicine at Mt Sinai, c/o G Esses, PO Box 1010, 1 Gustave L. Levy Pl, New York, NY 10029. Address e-mail to firstname.lastname@example.org.