Moragrega J L, Del Peral J M
Arch Inst Cardiol Mex. 1976 Jul-Aug;46(4):433-41.
The duration of the systolic intervals in 50 patients was studied. They were divided into the following groups of 10 each: 1) with normal intraventricular conduction; 2) with advanced right bundle branch block; 3) with advanced left bundle branch block; 4) with left anterior fascicular block, and 5) endocardial pacemaker in the right ventricle. The systolic intervals do not suffer modification in the presence of a right bundle branch block or a left anterior fasicular block. The left bundle branch block produces changes fundamentally in the preejection period at the expense of its two components. There also exists elevation of the systolic quotient. If the results obtained in various studies in the same patient are compared, it is possible to follow the evolution of ventricular alteration, but it is not valid, to make a comparison with the ideal values obtained in subjects with normal conduction. For those patients with a pacemaker in the right ventricular endocardium, the same criteria are applied as for the left bundle branch block. The shortening of the ejection period suggests a decrease in the volume of ventricular ejection.
对50例患者的收缩期间期进行了研究。他们被分为以下每组10人的几组：1）室内传导正常；2）右束支传导阻滞晚期；3）左束支传导阻滞晚期；4）左前分支阻滞，以及5）右心室内膜起搏器。在存在右束支传导阻滞或左前分支阻滞的情况下，收缩期间期未发生改变。左束支传导阻滞主要通过其两个组成部分改变射血前期。收缩期商数也会升高。如果比较同一患者在不同研究中获得的结果，可以追踪心室改变的演变，但与传导正常受试者获得的理想值进行比较是无效的。对于右心室内膜有起搏器的患者，应用与左束支传导阻滞相同的标准。射血期缩短提示心室射血量减少。
