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|本期目录/Table of Contents|

后负荷对左室射血力的影响(PDF)

《心脏杂志》[ISSN:1009-7236/CN:61-1268/R]

期数:
1995年第4期
页码:
221-223
栏目:
论著
出版日期:
1995-07-01

文章信息/Info

Title:
Influence of afterload off left ventricular ejection force
作者:
方 平1 吴宗贵1 张国元1 陈思聪1 王银富2
1第二军医大学附属长征医院心内科 上海 200003 2 84802部队医院
Author(s):
Fang PingWu ZongguiZhang Guoyuanet al
Changzheng Hospital,Second Military Medical University,Shanghai 200003
关键词:
左室射血力后负荷高血压超声心动描记术多普勒
Keywords:
left ventricular ejection forceafterloadhypertensionechocardiographydoppler
分类号:
-
DOI:
-
文献标识码:
-
摘要:
为了探讨Isaaz等根据牛顿第二定律测定的左室射血力是否与后负荷有关,我们将35例受试者分为正常组(20例)和高血压病组(15例)。用彩色多普勒超声心动图测取主动脉瓣前向血流的平均加速度(MA),加速时间内的速度时间积分(VTI)和主动脉瓣口面积(CSA),则左室射血力(LVEF)=ρ×CSA X VTI XMA,其中ρ为血液密度(1.06 g/cm3),ρX CSA X VTI为加速时间内的射血质量。分别将MA,VTI和LVEF与收缩压(SP)进行相关分析,结果MA,VTI和LVEF与SP呈显著负相关,(r分别为-0.78,-0.70和-0.67.P<0.01)。高血压病组的MA.VTI和LVEF均显著低于正常组。说明Isaaz等提出的左室射血力考虑到了加速度和质量的概念,是一项更为合理的方法,但是明显受后负荷影响,并且高血压病组的LVEF低于正常组.提示后负荷越重.左室射血力越低,所以使用该方法时应考虑到后负荷的作用。
Abstract:
In order to explore whether left ventricular ejection force(LVEF)determined by Isaaz et a1 was afterload-dependent,we tested 20 normal subjects(normal group)and 15 hypertensive patients(hypertensive group).A correlation analysis was made between aortic mean acceleration(MA),velocity-time integral(VTI),and LVEF measured by Doppler on the one hand and systolic blood pressure on the other hand.The results showed that MA,VTI and LVEF had good negative correlation with svstolic blood pressure(r=一0.78,一0.70 and一0.67,P<0.01)and that MA,VTI and LVEF were larger in the normal group than in the hypertensive group.These results suggested that LVEF determined by Isaaz et al was afterload-dependent.The influence of afterload should be considered when the index LVEF was used.

参考文献/References

[1]lsaaz K,Ethevenot G,Admant P.et al.A new Doppler method of assessing left ventricular ejection force in chronic congestive heart failure.Am J Cardiol 1989;64:81.

[2]方 平,潘 真,张国元,等.用多普勒方法研究冠心病左室射血力.中华物理医学杂志1993;15:13.

[3] Lioyd TR.Donnerstein RL.Afterload depcndeace of cchocardiographic left ventricular ejection force determination.Am J Cardiol 1991;67:901.

备注/Memo

备注/Memo:
Received 1994-09-19:revised 1995-01-04
更新日期/Last Update: 1995-07-01