Cardiovascular Mechanisms of Exercise Intolerance in Older Patients with Heart Failure.
Rev Cardiovasc Med
; 23(9): 313, 2022 Sep.
Article
en En
| MEDLINE
| ID: mdl-39077720
ABSTRACT
Exercise intolerance, measured by peak oxygen consumption (VÌO2), 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 VÌO2 with age that accelerates in the later decades of life. Peak VÌO2 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.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Idioma:
En
Revista:
Rev Cardiovasc Med
Asunto de la revista:
ANGIOLOGIA
/
CARDIOLOGIA
Año:
2022
Tipo del documento:
Article
País de afiliación:
Estados Unidos