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Depression and Anxiety in Heart Failure: A Review

Celano, Christopher M., MD; Villegas, Ana C., MD; Albanese, Ariana M., BA; Gaggin, Hanna K., MD, MPH; Huffman, Jeff C., MD

doi: 10.1097/HRP.0000000000000162

Learning objectives After participating in this activity, learners should be better able to:

• Identify the relationships between depression, anxiety, and heart failure (HF).

• Assess methods for accurately diagnosing depression and anxiety disorders in patients with HF.

• Evaluate current evidence for treatment of anxiety and depression in patients with HF.

Background In patients with heart failure (HF), depression and anxiety disorders are common and associated with adverse outcomes such as reduced adherence to treatment, poor function, increased hospitalizations, and elevated mortality. Despite the adverse impact of these disorders, anxiety and depression remain underdiagnosed and undertreated in HF patients.

Methods We performed a targeted literature review to (1) identify associations between depression, anxiety, and HF, (2) examine mechanisms mediating relationships between these conditions and medical outcomes, (3) identify methods for accurately diagnosing depression and anxiety disorders in HF, and (4) review current evidence for treatments of these conditions in this population.

Results Both depression and anxiety disorders are associated with the development and progression of HF, including increased rates of mortality, likely mediated through both physiologic and behavioral mechanisms. Given the overlap between cardiac and psychiatric symptoms, accurately diagnosing depression or anxiety disorders in HF patients can be challenging. Adherence to formal diagnostic criteria and utilization of a clinical interview are the best courses of action in the evaluation process. There is limited evidence for the efficacy of pharmacologic and psychotherapy in patients with HF. However, cognitive-behavioral therapy has been shown to improve mental health outcomes in patients with HF, and selective serotonin reuptake inhibitors appear safe in this cohort.

Conclusions Depression and anxiety disorders in HF patients are common, underrecognized, and linked to adverse outcomes. Further research to improve detection and develop effective treatments for these disorders in HF patients is badly needed.

From Harvard Medical School (Drs. Celano, Gaggin, and Huffman); Departments of Psychiatry (Drs. Celano, Villegas, and Huffman, and Ms. Albanese) and Medicine, Division of Cardiology (Dr. Gaggin), Massachusetts General Hospital, Boston, MA.

Supported, in part, by National Heart Lung and Blood Institute grant no. K23HL123607 (Dr. Celano) and National Institutes of Health grant no. R01HL113272 (Dr. Huffman).

Original manuscript received 2 November 2016, accepted for publication subject to revision 13 January 2017; revised manuscript received 11 February 2017.

Correspondence: Christopher M. Celano, MD, Massachusetts General Hospital, Blake 11, 55 Fruit St., Boston, MA 02114. Email:

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Heart failure (HF), a chronic impairment of cardiac function typically characterized by shortness of breath, edema, or fatigue,1 affects over 5 million Americans, with prevalence expected to rise to 8 million by 2020.2 Associated with poor functioning and impaired health-related quality of life (QoL), as well as frequent hospitalizations and high health care costs, HF represents a serious burden to both patients and the health care system.3,4 Mortality remains high despite advances in treatment, with roughly 50% of HF patients dying within five years of diagnosis.2

Psychiatric illnesses are prevalent in patients with HF, and prior work suggests that these disorders lead to negative health and cardiovascular outcomes in HF patients. Depression and anxiety disorders—including generalized anxiety disorder (GAD), posttraumatic stress disorder (PTSD), and panic disorder—are the most common psychiatric conditions in these patients. We performed a targeted review to determine the following: the associations between depression/anxiety and HF incidence and outcomes; potential mechanisms underlying these relationships; and methods for diagnosing and treating depression and anxiety disorders in this high-risk population.

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We performed focused literature searches using PubMed and Google Scholar to identify relevant original research and review articles. Search terms focused on epidemiology (e.g., “heart failure depression prevalence”), associations between psychiatric symptoms and HF outcomes (e.g., “panic disorder heart failure mortality”), pathophysiologic and health behavior mechanisms (e.g., “depression inflammation,” “post-traumatic stress disorder physical activity”), and treatments of depression and anxiety disorders in HF (e.g., “cognitive behavioral therapy depression heart failure”). Titles and abstracts from these searches were reviewed, full-text articles were obtained for relevant manuscripts, and reference lists were reviewed to identify additional manuscripts appropriate for review.

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Prevalence of Depression and Anxiety in HF

Among patients with HF, depression and anxiety disorders are common, with prevalences markedly higher than in the general population. A meta-analysis of 36 studies found that clinically significant depressive symptoms affect 21.5% of HF patients, with one-third of HF patients reporting elevated depressive symptoms on questionnaires and 19% meeting criteria for a depressive disorder (typically major depressive disorder, but some studies have included dysthymia and minor depression5) based on diagnostic interviews.6 These prevalences are similar in studies of inpatients and outpatients,6 and they are approximately two- to three-times higher than in the general population.7,8 Anxiety, too, is highly prevalent in this population, with about 13% of HF patients fulfilling diagnostic criteria for a formal anxiety disorder (usually GAD, though one study included panic disorder and unspecified anxiety disorder9), and nearly 30% of patients endorsing clinically significant levels of anxiety (based on anxiety questionnaires).10 These rates appear to be higher than those in older adults and other medical populations,10 though the method by which anxiety is measured and the overlap between anxiety and HF symptoms may affect reported prevalences.

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Links Between Depression/Anxiety and Adverse Medical Outcomes in HF

Depression has been linked to the development and progression of HF and other cardiovascular diseases. In a recent prospective observational study of nearly 2 million healthy adults, depression (defined by a billing diagnosis of depression or by prescription of an antidepressant) was prospectively associated with an 18% increased risk of HF development over the subsequent seven years (median), even after controlling for other cardiovascular risk factors.11 In another study of over 80,000 veterans without heart disease, a diagnosis of major depression (defined as one inpatient or two outpatient International Classification of Diseases (ICD)–9 codes for major depressive disorder) was linked to a 21% increased risk of HF development over the next 5.8 years in HIV-negative veterans, when taking other medical factors into account.12 In patients with a diagnosis of HF, depression also is a poor prognostic marker. In this group, both elevated depressive symptoms and depressive disorders have been prospectively linked to frequent hospitalizations, recurrent cardiac events, and mortality.6,13 In a meta-analysis of eight studies examining the prospective associations between elevated depressive symptoms or a depressive disorder and HF outcomes, Rutledge and colleagues6 found that depressive symptoms or a depressive disorder led to a twofold increased risk of death or cardiac events.

By contrast, associations between anxiety and health outcomes in patients with HF are less clear. To date, five studies have examined the link between anxiety and HF outcomes; four of these examined the relationship between anxiety symptoms and mortality in patients with HF,14–17 while one focused on the links between PTSD and subsequent development of HF.18 In the studies focused on anxiety symptoms, when controlling for relevant demographic and medical variables, there were no significant associations between anxiety and mortality.14–17 In a longitudinal prospective PTSD study, however, a diagnosis of PTSD (diagnosed based on ICD-9 codes for PTSD) at enrollment conferred a 47% increased risk of incident HF over the subsequent seven years.18 These findings raise the possibility that anxiety disorders may pose a significantly greater risk to cardiac health than the symptom of anxiety alone, consistent with prior work finding that anxiety disorders confer a much clearer risk of adverse cardiac outcomes than anxiety alone in coronary artery disease (CAD).19–21 Further studies are needed to examine the links between anxiety disorders and health outcomes in patients with established HF.

Though the literature linking anxiety to HF-related health has been mixed, several factors highlight the importance of identifying anxiety disorders in HF patients. First, anxiety has been associated with poor heart health and higher rates of mortality in patients with CAD, which often co-occurs with HF.20–22 Similarly, in patients with or without cardiac disease, anxiety disorders such as GAD, PTSD, and panic attacks/panic disorder are associated with poor cardiac outcomes.20,23–27 Furthermore, in patients who have HF and elevated depressive symptoms, the presence of comorbid anxiety increases the risk of poor cardiac outcomes, including rehospitalizations and mortality.28,29 Finally, in patients with major depression, the presence of anxiety may reduce antidepressant efficacy and lead to depression persistence.30–32

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Mechanisms Linking Depression/Anxiety and Adverse Health Outcomes in HF

Both physiologic and behavioral mechanisms may help to explain the associations between negative psychological states and outcomes in patients with HF (Figure 1).

Figure 1

Figure 1

Regarding behavioral mechanisms, adherence to healthy behaviors is critical to cardiac health. In patients without preexisting HF, physical inactivity is prospectively linked to the development of HF.33 Among patients with HF, poor self-care—including nonadherence to physical activity, a low-sodium diet, and pharmacologic treatment—is associated with worse outcomes, including reduced QoL, higher rates of hospitalizations, and mortality.34

Depression and anxiety may make it more challenging for patients with heart disease to adhere to health behavior recommendations. For example, depressed patients with CAD are less likely than those without depression to maintain a healthy diet,35 exercise regularly,35,36 adhere to medications,35,37 or complete cardiac rehabilitation.38 In addition, patients with depression are less able than nondepressed individuals to lower their cholesterol,39 and depressed patients with HF and other cardiovascular diseases are less likely to complete cardiac rehabilitation.40

There is also evidence that anxiety is associated with unhealthy behaviors and cardiovascular risk, though the evidence is less robust than that for depression. Anxiety disorders are linked to smoking, physical inactivity, binge drinking, and heavy drinking,41 and PTSD, in particular, is linked to reduced physical activity and smoking.42 Like depression, anxiety is associated with poorer adherence to risk-reducing health behaviors, such as physical activity or smoking cessation following myocardial infarction (MI).43

Physiologic factors may also play a major role in the connection between psychiatric symptoms and adverse outcomes in HF. For example, inflammation is implicated in the pathogenesis of several different subtypes of HF44,45 and may be a driver of ventricular remodeling that leads to increasing fibrosis and the progression of cardiac dysfunction.46 Among patients with known HF, interleukin (IL)-6—a marker of inflammation—is linked to both short- and longer-term cardiovascular mortality.47

Depressive symptoms and major depression are linked to elevated levels of inflammatory biomarkers. In a recent meta-analysis that included patients with and without cardiovascular disease, depression was associated with increased levels of C-reactive protein (CRP), IL-1, and IL-6,48 and other studies have found links between depression and tumor necrosis factor–alpha (TNF-alpha) and monocyte chemoattractant protein–1 (MCP-1).49 Likewise, an analysis of data from the Cardiovascular Health Study found that depression was linked to higher levels of inflammatory and fibrosis markers.50 Finally, in a study of individuals with both major depression and HF, depression was associated with multiple inflammatory markers.51

Relationships between anxiety and inflammatory markers are less clear. While some studies have found links between anxiety and higher levels of CRP, TNF-alpha, IL-6, homocysteine, IL-17, and fibrinogen levels in non-cardiac populations,52,53 others have not.53,54 The evidence for links between anxiety disorders and inflammation, however, is more consistent. In patients with CAD, GAD has been associated with elevated levels of CRP.55 Similarly, compared to healthy controls, patients with PTSD have higher levels of IL-6, IL-1 beta, and interferon-gamma.56 Thus, inflammation may be one physiologic mechanism through which anxiety and depression are associated with cardiac outcomes in HF.

Changes to the autonomic nervous system are also implicated in the relationships between depression, anxiety, and cardiac outcomes. Cardiac activity and vascular tone are modulated by the sympathetic and parasympathetic nervous systems, with the sympathetic nervous system typically promoting increased heart rate and vasoconstriction and the parasympathetic nervous system promoting bradycardia and vasodilation. In HF, an imbalance in autonomic nervous system function, characterized by relative hyperactivity of the sympathetic nervous system and hypoactivity of the parasympathetic nervous system, is common.57 This imbalance can lead to cardiac remodeling and arrhythmias, and it has been linked to mortality in HF.57

Negative psychological states are associated with sympathetic hyperactivity and parasympathetic hypoactivity. For example, both depression and anxiety have been associated with reduced heart rate variability, a sign of abnormal autonomic function, in patients with and without heart disease. This suggests the autonomic dysfunction described above.58–61 These reductions in heart rate variability are most pronounced in patients with more severe depressive symptoms, suggesting that patients with formal major depression may be at particularly high risk for autonomic dysfunction.60

Endothelial function may also be important. Proper function of the endothelium (the dynamic layer of cells lining blood vessels) is critical for heart health, as it helps to ensure adequate perfusion of the heart and other organs, and reduces strain on the heart. In patients with HF, endothelial dysfunction is prospectively linked to increased HF-related events and all-cause mortality.62–64 Both depression and anxiety are associated with endothelial dysfunction in patients with and without HF. In patients with HF, depressive symptoms are associated with a lower L-arginine/asymmetric-dimethylarginine (ADMA) ratio, indicating reduced nitric oxide availability, leading to endothelial dysfunction.65 Similarly, in patients with CAD, depressive symptoms are associated with impairments in flow-mediated dilation, another marker of endothelial dysfunction.66

Anxiety is also associated with impaired endothelial function—measured by flow-mediated dilation—in patients with and without heart disease.67,68 Furthermore, PTSD is associated with elevated markers of endothelial dysfunction, including soluble intercellular adhesion molecule–1 (sICAM-1), vascular cell adhesion molecule–1 (VCAM-1), E-selectin, and soluble tissue factor in some, but not all, studies.69,70

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Diagnosis of Depression and Anxiety Disorders in Patients with HF

Despite the high rates of depression and anxiety in HF, and their links to adverse outcomes in this population, these psychiatric symptoms often are overlooked in clinical practice. For example, inpatient providers succeed in identifying only half of post-MI patients who have elevated anxiety,71 and the majority of depressed individuals are not recognized as such.71,72 Accurate psychiatric diagnosis may prompt clinicians to offer psychiatric treatment, which, in turn, could improve health behaviors, enhance engagement in cardiac treatment, and ultimately improve clinical outcomes.

Due to the significant overlap in symptoms shared between HF and major depression and anxiety disorders, making an accurate psychiatric diagnosis in patients with HF can be challenging. However, accurately diagnosing these disorders when present—and excluding them when absent—is critical, as both over- and underdiagnosis can have significant consequences (e.g., overdiagnosis may lead to inappropriate exposure to medications and side effects, whereas underdiagnosis may lead to worse psychiatric health and functioning). Given the complexities inherent to this diagnostic process, it is highly recommended that clinicians carefully examine HF patients to assess whether they meet full Diagnostic and Statistical Manual of Mental Disorders–5 (DSM-5) criteria for major depression or an anxiety disorder.73 Among other things, patients must endorse the cardinal symptoms of the disorders under question, such as depressed mood or anhedonia, most of the day, nearly every day, for two consecutive weeks. Adhering to DSM-5 criteria helps to ensure that symptoms leading to diagnosis, such as isolated problems with sleep, concentration, or energy, are not simply manifestations of HF.

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Use of Screening Tools to Improve Recognition

To increase recognition of depression and anxiety disorders in patients with cardiovascular disease, some organizations have recommended systematic screening for common psychiatric illnesses. For example, the American Heart Association recommends two-step depression screening of all patients with heart disease using the two-item Patient Health Questionnaire (PHQ-2),74 followed by the 9-item PHQ-9 for positive-screen patients.75 This two-step procedure is highly specific (91%) but relatively insensitive (52%) in patients with stable CAD,76 suggesting that it is a good screening tool but that positive screens should be followed by a more thorough assessment to confirm diagnosis. This two-step screening procedure has not been examined specifically in HF patients, but the PHQ-9 has adequate sensitivity and specificity (70% and 92%, respectively) for major depression in this group of patients.77

Although universal screening for anxiety disorders has not yet been recommended, it may be useful to screen for GAD. This disorder not only is prospectively associated with poor cardiac outcomes in post-MI patients20 but may be as prevalent as major depression in hospitalized cardiac patients.78 In addition, comorbid anxiety can reduce the effectiveness of depression treatment and has been linked to worse cardiovascular health.28–32 Easy to administer GAD screening tools, such as the two- and seven-item GAD-2 and GAD-7, have demonstrated adequate specificity and sensitivity for identifying GAD.79–81

Despite the potential benefits of screening for depression and anxiety disorders, the practical details of when and where to screen are less clear. For instance, while screening for psychiatric disorders following an acute cardiac event may be highly efficient and identify many patients with elevated depressive or anxiety symptoms, these symptoms may dissipate following the cardiac events and may not represent full-fledged psychiatric disorders. Similarly, given that screening for psychiatric conditions when dedicated treatment is not available has demonstrated little benefit,82,83 screening for depression and GAD in HF patients should occur only in programs that have a clear process to ensure that treatment can be initiated and monitored. If screening is performed in acute care settings, deferring the final diagnosis to a period of clinical stability may be advisable if the diagnosis is new in onset during the admission or is unclear.

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Management of Depression and Anxiety Disorders in HF

Both psychotherapeutic and medication treatments are available for depression and anxiety disorders in patients with HF. Psychotherapy offers several advantages over pharmacotherapy. First, it can be customized for individual patients. Second, it has no known side effects or interactions with patients’ cardiac medications. Finally, it may help patients to develop long-term skills to improve symptoms and prevent relapse. Despite these potential advantages, few studies have been performed to examine the efficacy of psychotherapy in HF patients.

Cognitive-behavioral therapy (CBT) is the only psychotherapeutic treatment that has been tested systematically in HF patients, with beneficial effects.84–87 In a single-arm trial of 23 patients with elevated depressive or anxiety symptoms and a history of HF or chronic obstructive pulmonary disease, a six-week CBT intervention led to large improvements in HF-related QoL and moderate improvements in depressive symptoms.84 In a larger (n = 74), four-arm, randomized pilot trial comparing CBT and exercise training versus CBT alone versus exercise training alone versus usual care in patients with major depression (diagnosed using DSM-IV criteria) and HF, the combined treatment group showed the greatest—but nonsignificant—improvements in depression-related outcomes.86 This finding suggests that CBT could be used in concert with other health behavior-enhancing interventions.

The largest CBT trial to date for patients with HF was the Depression and Self-Care of HF trial. In that study, the efficacy of a six-month CBT intervention was tested in 158 patients diagnosed with major depression (diagnosed using DSM-IV-TR criteria) and HF.88 Compared to enhanced usual care, the CBT intervention led to greater improvements in depression (reduction in depressive symptoms and higher rates of remission) and greater improvements in anxiety, fatigue, and life satisfaction. However, it did not lead to changes in physical functioning or self-care.

Regarding medications, antidepressants—particularly selective serotonin reuptake inhibitors (SSRIs)—are the first-line treatment for major depression, GAD, PTSD, and panic disorder.89–91 While these agents are effective in patients without heart disease, the evidence for their use in HF is mixed. Two early randomized trials of depressed patients (one using the structured clinical interview for DSM-IV [n = 37], and one requiring Beck Depression Inventory scores ≥ 10 [n = 28]) with HF, found that both citalopram and controlled-release paroxetine led to significantly greater reductions in depressive symptoms compared to placebo.92,93 However, two larger randomized trials examining the efficacy of escitalopram and sertraline for depression in HF did not replicate these findings. In the Mood and Mortality in Depressed HF Patients (MOOD-HF) study of 372 patients with major depressive disorder (diagnosed using the structured clinical interview for DSM-IV), both escitalopram and placebo led to significant reductions in depressive symptoms, but there were no significant between-group differences.94,95 Similarly, in the Sertraline Against Depression and Heart Disease in Chronic Heart Failure (SADHART-CHF) trial (n = 469; major depressive disorder diagnosis using DSM-IV criteria), sertraline was no more effective than placebo at reducing depressive symptoms at three months.96

Several factors may account for the findings of the MOOD-HF and SADHART-CHF trials. One possible explanation relates to the overlap between the somatic symptoms of HF and those of depression or anxiety. While we would expect antidepressants to improve somatic symptoms caused by depression, those related to HF generally will not improve (and will likely worsen) over time. Since many depression scales include a combination of cognitive and somatic symptoms,97,98 the apparent inefficacy of antidepressant treatments may be related to a failure to affect somatic symptoms. A second possible explanation for the negative findings of these trials is that some instances of major depression in HF patients may be biologically distinct from typical depression and therefore may not respond as well to antidepressant treatment. In both the MOOD-HF and SADHART-CHF, participants had a mean age of 62 years, and in both studies over 80% of participants were experiencing their first depressive episode at the time of enrollment. Given that the incidence of major depression peaks between 30 and 40 years,99 the depression in these patients may have been physiologically distinct from that in the general population and less responsive to treatment.

Despite the lack of clear efficacy for SSRIs in patients with HF, we still recommend their use for treatment because of their known efficacy for depression and anxiety disorders in other populations.89–91 However, in order to maximize the likelihood of response, we would recommend frequent monitoring, titration, and switching of medications/treatments if patients are not responding initially to treatment.

Regarding safety, SSRIs appear to be associated with few adverse cardiac side effects. They cause mild increases in norepinephrine and have minimal affinity for adrenergic receptors, and are thus less likely than older tricyclic antidepressants (TCAs) to cause orthostatic hypotension or tachycardia.100 In addition, SSRIs have little effect on intraventricular conduction.100 SSRIs induce three noteworthy side effects, however, in patients with HF and other cardiovascular conditions. First, through their inhibition of platelet aggregation/activation and enhancement of gastric acid secretion, SSRIs can increase bleeding risk, especially in patients receiving antiplatelet or anticoagulant medications.101,102 Second, SSRIs can cause QTc prolongation, which increases the risk of potentially lethal ventricular arrhythmias.103 In a recent meta-analysis, SSRIs as a class prolonged the QTc interval by an average of 6.10 milliseconds, although these changes varied by the specific agent: citalopram and escitalopram caused the greatest QTc prolongation, and other agents led to minimal or no prolongation.103 Of note, though the SSRIs do lead to QTc prolongation, they do so to a significantly lesser degree than TCAs.103 Finally, certain SSRIs may lead to changes in cardiovascular and antidepressant medication levels through interactions with other cardiovascular agents (e.g., warfarin, antiarrhythmics, angiotensin receptor blockers), which could lead to side effects.104 Of the SSRIs, sertaline, citalopram, and escitalopram have a low risk of interactions, whereas fluvoxamine, fluoxetine, and paroxetine have a higher risk.104

Other antidepressants have been evaluated for safety and efficacy in patients with heart disease. One randomized, placebo-controlled trial conducted in post-MI patients found mirtazapine to be an effective and safe treatment to reduce depressive symptoms.105 Although never studied for the management of depression in patients with cardiovascular disease, bupropion has been found to have minimal cardiovascular side effects in cardiac patients (including those with HF).100,106,107 Venlafaxine and duloxetine have less clear evidence regarding their safety. One large epidemiologic study in older adults found that venlafaxine, compared to sertraline, led to no increase in risk of cardiovascular events and was linked to a lower risk of HF.108 Venlafaxine causes mild increases in blood pressure and heart rate, however, and several cases of acute HF have been linked to venlafaxine overdose.109,110 In addition, case reports suggest that in patients with HF, venlafaxine and duloxetine may worsen symptoms of HF.111 Given this mixed evidence, venlafaxine and duloxetine should be used with caution in patients with HF. Finally, due to their propensity to cause cardiovascular side effects, including tachycardia, orthostasis, and conduction abnormalities, TCAs are generally avoided in patients with HF or other cardiovascular disease when alternatives are available.

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Integrated Care Models in the Management of Depression and Anxiety Disorders in Patients with Heart Disease

A promising method for delivering psychiatric care for patients with depression or anxiety disorders is collaborative care. This model involves the use of a non-physician care manager—supervised by a psychiatrist—to screen for psychiatric disorders and coordinate the treatment of these disorders within each patient’s current medical treatment. In primary care settings, where these programs have most commonly been studied and implemented, collaborative care programs have led to improvements in depression, anxiety, and health-related QoL.112 Collaborative care programs are similarly effective in depressed patients with cardiovascular disease,113–117 and one program that focused on treating both depression and cardiovascular risk factors led to improvements in both mental and physical health outcomes, including blood pressure, hemoglobin A1c, and low-density lipoprotein cholesterol.115 The Patient-Centered Disease Management study—the only prior study of collaborative care exclusively in patients with HF—examined the efficacy of a multicomponent collaborative-care intervention focused on the management of HF symptoms and depressive symptoms (if present).118 While this study did not find the intervention to be superior to enhanced usual care on improving HF-related QoL (the study’s primary outcome), patients with depression experienced greater improvements in depressive symptoms.118

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Treatment Selection

Choosing a treatment for an HF patient with depression or an anxiety disorder depends on multiple factors, including patient preference, treatment and provider availability, and others related to the patient and local health care system. In cases of relatively straightforward major depression or anxiety disorders, collaborative care programs may be ideal, given that these programs often allow for the use of either pharmacologic or psychotherapeutic interventions within the framework of existing medical treatment. Of course, collaborative care programs are not available in many settings, and reimbursement for such programs remains an important issue.

When collaborative care programs are unavailable, an initial treatment of an SSRI or CBT is sensible. CBT may be preferable, given stronger evidence for efficacy in this population and the lack of potential side effects. However, many patients are not able or willing to attend regular psychotherapy sessions, and here, too, the limited availability of an experienced CBT clinician may be an issue. Given these issues, medication treatment, especially an SSRI, is often a straightforward option. In terms of selecting a specific SSRI, sertraline is often preferred because of its established safety in patients with heart disease (including those with HF) and its relatively few drug-drug interactions. Citalopram and escitalopram may be additional options because of their prior use in studies of patients with heart disease and few drug-drug interactions, though an alternative SSRI may be preferable in those with known QTc prolongation or risk factors for such prolongation. It is reasonable to initiate treatment at low doses to ensure tolerability, but it is important to ensure that effective doses are reached and that ongoing adjustment of treatment occurs until remission is reached.

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This article has several notable limitations. First, the literature on the topic of depression and anxiety in HF is highly variable, with studies using different criteria for diagnosing depression, anxiety disorders, and HF. As a result, interpreting the results of these studies (e.g., the directionality of the relationships between depression/anxiety and HF) is challenging, and comparing findings between studies may be difficult or impossible. Second, studies examining the associations between psychiatric symptoms and cardiovascular health may have included different covariates in their analyses, which adds to the heterogeneity of the literature. Third, many of the treatment studies (especially the medication studies) were relatively small, which limited their power to detect significant between-group differences and may have contributed to their negative findings. Finally, given the breadth of topics covered and the goal of providing a broad overview of depression and anxiety disorders in HF, we chose to perform a narrative review, rather than a systematic review. As a result, it is possible that not all articles published on this subject were included in this manuscript.

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In patients with HF, major depression and anxiety disorders—especially GAD—are highly prevalent, and these psychiatric illnesses have been linked to poor medical and functional outcomes. Though diagnosing a psychiatric illness can be challenging in view of the significant overlap between psychiatric and HF-related symptoms, making the effort can help to identify those who are at higher risk for poor cardiac outcomes and to implement the treatment of these disorders. The use of SSRIs or CBT appears safe, but they have had somewhat limited effects on psychiatric and cardiac outcomes. It is likely that an aggressive, multimodal treatment approach—such as collaborative care models or stepped care from a mental health professional—will be needed to improve psychiatric and cardiac health in this high-risk population.

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Declaration of interest

Dr. Celano has received honoraria for talks to Sunovion Pharmaceuticals on topics unrelated to this research.

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anxiety; depression; diagnosis; heart failure; treatment

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