A 45-year-old man with a 5-year history of nonischemic cardiomyopathy with an ejection fraction of 30% was seen in routine follow-up in the heart failure (HF) clinic. He had only mild limitation of activity with New York Heart Association (NYHA) Functional Classification I to II symptoms. He had been on a stable regimen of guideline-directed medical therapy for at least 6 months.
In symptom review, he noted that he was having trouble sleeping though he did not have paroxysmal nocturnal dyspnea or orthopnea. He was not noted to snore or have nocturnal apneic episodes according to his wife. It was noted that he had lost 5 pounds and he stated that he had little appetite. He further noted that he had difficulty concentrating on tasks and that, although he had previously engaged in a routine walking regimen, he now had little interest in activity and spent most of his time sitting at home watching television.
He completed the Patient Health Questionnaire 9 (PHQ-9) while waiting for his appointment. The total score on the first part of this depression screening tool was 16, which was consistent with significant depression and suggested the need for treatment. The patient agreed that he was likely depressed and had “felt down” for many days over the past 2 months.
His physician discussed with him the problems of depression in patients with HF and they began discussions of treatment options.
PREVALENCE OF DEPRESSION IN HEART FAILURE
Depression is a comorbidity common to most forms of heart disease.1 However, it especially affects those with HF. Ferketich and Binkley analyzed a large cohort of respondents to the National Health Interview Survey (NHIS).1 Of this cohort, 17,541 completed the K6 depression screen, which is a 6-item questionnaire designed for the NHIS. Table 8-1 shows the odds ratios for reporting depression in different cardiovascular disease categories as compared to those who did not report a history of cardiovascular disease. It can be seen that there is a progressive increase in the odds ratio for reporting symptoms of depression with the lowest odds ratio being in those with coronary heart disease and the highest odds ratio in those with HF. Therefore, although all patients with heart disease have an increased risk for having depression, those with HF have a 3.6 to 1 odds ratio compared to those without heart disease. As shown in Table 8-2, smaller studies have further demonstrated the increased prevalence of depression in those with HF.2 Further, patients with HF and depression have increased mortality and an increase in the risk for hospital admission.
Table 8-1Odds Ratios and 95% CI for Elevated K6 Scores Associated with the Various Cardiovascular Disease Conditions