以脉冲波多普勒超声测定正常人经二尖瓣口流速,其E蜂为心室被动充盈,而A峰为心房主动收缩所致,通常E/A比值>1。E/A比值<1则提示心室动能异常,但有例外。经二尖瓣口流速作为一项临床指标,其重复性和稳定性必须得到确认,作者前瞻性观察如下。资料和方法:(1)病人选择:连续观察29例,E/A比值均<1,剔除7例不合要求者。分析其余22(男8、女14)例,中位数年龄为69(1～80)岁,各例均为实性心律,平均心率73(50～100)bpm,先后二次检查时心率相差小于8(平均4)bpm。其中13例超声检查证实有左室肥厚(11例伴主动脉瓣狭窄),另9例为缺血性心脏病,均无二尖瓣疾患的超声表现。二次检 Pulse wave Doppler ultrasound measured by the mitral valve orifice velocity, the E bee ventricular passive filling, and A peak due to atrial active contraction, usually E / A ratio> 1. E / A ratio <1 indicates abnormal ventricular dysfunction, with the exception. The mitral valve flow rate as a clinical indicator, its repeatability and stability must be confirmed, the prospective observation follows. Materials and Methods: (1) Patient Selection: 29 consecutive patients were observed, the E / A ratio was less than 1, 7 were excluded. Analysis of the remaining 22 (male 8, female 14) cases, the median age of 69 (1 to 80) years, all cases were solid heart rate, the average heart rate 73 (50 ~ 100) bpm, twice the second heart rate difference Less than 8 (average 4) bpm. Thirteen of the patients had left ventricular hypertrophy confirmed by ultrasonography (11 with aortic stenosis) and 9 with ischemic heart disease, with no evidence of mitral valve disease. Secondary inspection