Índices de contratilidade da fase isovol urétrica antes e depois do "Handgrip" em pacientes normais e cardiopatas

Abstract

Myocardial contractility índices of isovolumetric phase(peak dp/dt, Vmax, Vpm and corrected dp/dt) were measured with fluid-filled catheters in 2.7 patients, before and after 2mns of sustained handgríp exercíse. Group Kcontrol sübjects) consisted of 10 normal patients,group II consisted of .13 patients with cardiomyopathy and group III consisted of patients with mitral valve prolapse and normal ejecti.cn fraction. The measurements of peak dp/dt, VmaxCfrom. total pressure and linear extrapolation), Vpm and corrected dp/dt served to separate the normal population and the population with cardiomyopathy from a statistical standpoint, but individual values in the two groups showed some overlap. During handgríp, contractility Índices of isovolumetric phase increased significantly in normal patients but not in patients with cardiomyopathy, while left ventricular end diastolic pressure increased significantly in group II patients but not in the normal patients. The overlap between thiã isovolumetric phase índices in groups I and II tended to disapear during the handgríp, particularly in relation to Vmax, Vpm and corrected dp/dt.