运动负荷多谱勒超声心动图观察高血压病人的左室舒张功能

目的 :观察运动负荷状态下高血压病人和正常人左室舒张功能的改变及差别。方法 :高血压病人及正常对照各 15例 ,二组超声心动图 2 DE观察和 M型测量心内结构均正常 ,静息状态下左室收缩、舒张功能正常。进行卧位踏车运动 ,从心尖四腔图取二尖瓣血流频谱 ,观察 E峰流速 (VE)、A峰流速 (VA)、E峰流速时间总积分 (ETVI)、A峰流速时间总积分 (ATVI)、总流速积分(TTVI)、ATVI/ TTVI、VE/ A,于 70、80、90、10 0次 /分心率时分别测量 ,进行组内不同心率时及同一心率时二组间比较。结果 :组内比较 VE各心率组组内无差异。VA高血压组 80次/分开始加速 ,对照组 10 0次 /分显加速。ETVI高血压组 90次/分开始减小 ,对照组各心率组均无差异。 ATVI高血压组 90次 /分开始增大 ,对照组各心率组无差异。 ATVI/ TTVI高血压组 80次 /分开始增大 ,对照组 10 0次 /分开始增大。VE/ A高血压组 80次 /分开始下降 ,对照组 10 0次 /分开始下降。组间比较心率 80次 /分开始 VE/ A高血压组明显低于对照组 ,心率 90、10 0次 /分时高血压组较对照组 VA明显增快 ,ETVI减小 ,ATVI增大 ,ATVI/ TTVI增大。结论 :运动负荷状态下高血压病人较正常人舒张功能改变出现得早。运动负荷超声心动图是一种简便、无创的评价心脏代偿功能的方法

Left Ventricular Diastolic Function in Hypertension Patients:\; A Trial by Stress Doppler Echocardiography

Aim:To observed the left ventricular diastolic function in hypertension patients by stress doppler echocardiography and compared with normal control. Methods and Resultsdoppler echocardiography in lying treadmil exercise were exmanied in 15 cases hypertension patients and 15 matched healthy subjects as control. Cardiac struture and left ventriclar diastolic and systolic function in rest were normal when analyzed by two dimensional echocardiography and M mode Doppler. E peak velocity(VE),A peak velocity(VA),E peak total velocity integral(ETVI), A peak total velocity integral(ATVI) were assessed in mitral valve septum from apical for chamber view in the heart rate of 70,80,90, and 100 per minute.There is no difference among all kinds of the heart rate in two groups about VE. In the hypertension patients EA was accelerated in 80/min,but in control group was in 100/min. ETVI was decreased in 90/min, no difference in controls. ATVI was increased in 90/min,no difference in controls. VE/A was decreased in 80/min,but 100/min in controls. VE/A in hypertension was significantly lower than controls in all heart rate period. Conclusion:Left ventricular function in hypertension was decreased earlier than controls in stress status. Stress Doppler echocardiography may provide quantitative and non traumatic assessment of cardiac compensating function.