Conditions: Depression Heart Diseases
Keywords: Exercise
Allocation: RANDOMIZED | Intervention model: PARALLEL
Enrollment: 101
Healthy volunteers: no

Brief summary:
Some individuals with coronary heart disease (CHD) suffer from depression and use antidepressant medications to reduce symptoms. However, preliminary research has shown that exercise may be a more effective way to treat depression in these individuals. The purpose of this study is to evaluate the effects of exercise in reducing depression and improving heart function in individuals with CHD.

Detailed description:
Coronary heart disease (CHD) is caused by a narrowing of the small blood vessels that supply blood and oxygen to the heart. It is the leading cause of death in the United States. Recent evidence has suggested that depression is a significant risk factor for individuals with CHD and may place additional strain on the heart. Selective serotonin reuptake inhibitors (SSRIs), a type of antidepressant medication, have been shown to be especially effective at reducing depression symptoms, particularly for individuals with CHD. However, many people fail to benefit from medication alone or they experience negative side effects. Therefore, a need exists to identify alternative approaches for treating depression in individuals with CHD. Preliminary research has shown that exercise may be an effective way to improve mood and treat depression. More research, however, is needed to confirm the benefits of exercise in individuals with CHD. The purpose of this study is to compare the effectiveness of a supervised exercise program, antidepressant treatment, and placebo in reducing depression and improving heart function in individuals with CHD.

This 16-week study will enroll adults with a history of CHD and depression. Participants will be randomly assigned to an aerobic exercise program, antidepressant medication, or placebo. At study entry, standardized psychological questionnaires will be completed and depression levels and exercise tolerance will be assessed. Participants' heart function will be evaluated through measures of flow-mediated vasodilatation, inflammation, platelet function, baroreflex, and heart rate variability. Participants assigned to the exercise program will be required to engage in structured aerobic exercise. Participants assigned to antidepressant medication will receive sertraline, an SSRI or placebo. The treating psychiatrist will be blinded to pill condition and will use supportive measures to help manage medication side effects. Outcome assessors will be unaware of patients' treatment assignments, and only the research pharmacist will be aware of which patients are assigned to sertraline or to placebo.

At Week 16, participants will return to the clinic for repeat assessments of baseline measures. A follow-up evaluation will occur six months following the end of treatment, and participants' depression levels and clinical status will be assessed.

Arms:
arm 1: Supervised aerobic exercise, three times per week for 16 weeks. arm 2: Sertraline (Zoloft), for 16 weeks. arm 3: Placebo control, for 16 weeks.

Interventions: intervention 1: Supervised Aerobic Exercise intervention 2: Sertraline intervention 3: Placebo Pill.
Intervention descriptions: intervention 1: Supervised aerobic exercise, three times per week, for 16 weeks. intervention 2: Sertraline (Zoloft), daily, for 16 weeks. intervention 3: Placebo pill, daily, for 16 weeks.

Protocol document: