Clinical study on evaluating the function of cardiac reserve in hypertensive patients with noninvasive techniques / 重庆医科大学学报

ABSTRACT

Objective:To explore whether phonocardiogram exercise test(PCGET) or doppler echocardiography can sensitively and specifically detect the changes of cardiac reserve in patients with hypertension and whether there is a relationship between the two methods.Methods:The trail was performed with eighty volunteers, including twenty healthy persons as control group,and sixty hypertensive patients, which were divided into three subgroupshypertension A, HA(patients without left ventricular hypertrophy,LVH and enlarged left ventricle);hypertension B, HB(patients with only LVH) and hypertension C,HC(patients with both LVH and enlarged left ventricle).The cardiac contractility reserve index(CCRI) was measured by PCGET, while the value of LV end-systolic and end-diastolic long and short axis dimensions, wall thickness and synchronous blood pressure were measured by the technique of simultaneous screen display of electrocardiography and synchronously monitoring blood pressure.According to the parameters measured by the latter technique, the values of maximum elasticity(Emax), the average maximum myocardial elasticity stiffness(maxEav) and ejection fraction(EF)were calculated by computer programmed process.Results:(1)Compared with control group,there was a statistically significant difference between the hypertension groups except HA group,and also an obvious difference between HB and HC about the indexes of Emax, maxEav and EF(P