Exercise-Stress Echocardiography and Effort Intolerance in Asymptomatic/Minimally Symptomatic Patients With Degenerative Mitral Regurgitation Combined Invasive-Noninvasive Hemodynamic Monitoring

摘要

BACKGROUND: Effort intolerance, measured objectively by reduced peak oxygen consumption (Vo(2)), has been considered as an important prognosticator in degenerative mitral regurgitation (MR). However, its mechanism is unknown.