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在临床心电图中,当房室传导受到抑制而使窦性激动不能下传心室时,心肌传导组织常常出现一些保获性机制以免心室停搏,其中最常见的就是受抑制部位以下传导组织发生的逸搏激动或逸搏心律。还有魏登斯基(Wedensky)现象(包括魏登斯基效应及魏登斯基易化作用),后者并不多见。我们最近观察到一例特报告于后。为便于理解,先将有关概念介绍如下: 一、魏登斯基效应(Wedensky effect):魏登斯基(1886)在青蛙的神经——肌肉实验标本中观察到:当神经有传导阻滞时,阈下刺激(指刺激的强度低于阻滞区的应激阈值)不能通过阻滞区,但如在阻滞区的一侧先施
In clinical electrocardiograms, when conduction in the atrioventricular system is inhibited and sinus agitation fails to transmit the ventricle, the myocardial conduction tissue often presents with some of the safeguarded mechanisms to prevent ventricular arrest, the most common of which is the conduction tissue below the site of inhibition Yat excited or escape heart rhythm. There are also Wedensky phenomena (including the Weydenky effect and Wentingski facilitation), the latter rare. We have recently observed a special report later. To facilitate understanding, we first introduce the concepts as follows: I. Wedensky effect: Wedensky (1886) observed in the frog neuromuscular test specimens that when the nerve has conduction block , The subthreshold stimulation (referring to the intensity of the stimulus below the threshold of the block zone) can not pass through the block, but as one side of the block