Author Interviews, Depression, Heart Disease / 05.01.2015
Depression Linked To Functional Decline In Heart Disease Patients
MedicalResearch.com Interview with:
Nancy L. Sin, Ph.D. Postdoctoral Fellow
Center for Healthy Aging & Department of Biobehavioral Health
The Pennsylvania State University
University Park, PA 16802
Medical Research: What is the background for this study? What are the main findings?
Dr. Sin: Older patients with coronary heart disease often experience declines in functional status, which is the ability to perform daily activities such as bathing, walking, and doing housework. The key factors that contribute to functional status among cardiac patients are not well-understood. Previous studies have found only weak or no associations between cardiovascular disease severity and functional status. Psychological factors—such as depression—are known to increase the risk of functional impairment, but this has not been studied long-term in patients with coronary heart disease.
It is unclear the extent to which long-term functional status is determined by psychological factors versus cardiovascular disease severity. The purpose of our study was to compare the contributions of depressive symptoms with those of cardiovascular disease severity (specifically, left ventricular ejection fraction, exercise capacity, and angina frequency) for predicting subsequent functional decline in 960 older adults with stable coronary heart disease.
Across a 5-year period, people who had more severe depressive symptoms were at greater risk of functional decline, independent of cardiovascular disease severity, demographics, health behaviors, cognitive function, and other factors. Low exercise capacity was also strongly related to future functional decline, but ejection fraction and angina frequency were not. These findings underscore the importance of considering both mental and physical health in determining long-term functional status.


















