Cardiovascular Mechanisms of Exercise Intolerance in Older Patients with Heart Failure.
Publication/Presentation Date
9-1-2022
Abstract
Exercise intolerance, measured by peak oxygen consumption (V̇O2), is a hallmark feature of heart failure (HF). The effect is compounded in the elderly HF patient by aging-associated changes such as a reduction in lean muscle mass, an increase in adiposity, and a reduction in maximal heart rate and peripheral blood flow with exercise. There is a non-linear reduction in peak V̇O2 with age that accelerates in the later decades of life. Peak V̇O2 is further reduced due to central and peripheral maladaptation from HF. Central mechanisms include impaired peak heart rate, stroke volume, contractility, increased filling pressures, and a blunted vasodilatory response. Peripheral mechanisms include endothelial dysfunction, reduced blood flow to muscles, and impaired skeletal muscle oxidative capacity. This review presents a focused update on mechanisms leading to impaired aerobic capacity in older HF patients.
Volume
23
Issue
9
First Page
313
Last Page
313
ISSN
2153-8174
Published In/Presented At
Singam, N. S. V., Tabi, M., & Fleg, J. L. (2022). Cardiovascular Mechanisms of Exercise Intolerance in Older Patients with Heart Failure. Reviews in cardiovascular medicine, 23(9), 313. https://doi.org/10.31083/j.rcm2309313
Disciplines
Medicine and Health Sciences
PubMedID
39077720
Department(s)
Department of Medicine
Document Type
Article
