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室上性心律失常与心房颤动关系再认识 被引量:1

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摘要 心房颤动(atrial fibrillation,AF)是室上性心律失常常见的合并症。与普通人群相比,阵发性室上性心律失常患者AF发生率显著升高,且一般表现为阵发性AF。但迄今为止,AF发生的电生理机制并不十分明朗,其机制有多种学说,如多子波折返学说、异常自律性增高学说、主导转子学说、局灶触发学说等。但不管何种学说,AF的发生必须依赖两个因素,即发生机制和维持机制,两者缺一不可。目前越来越多的证据表明,AF的机制很可能是局灶驱动伴向周围的颤动样传导,多发子波折返仅仅是AF时心房激动的一种表现形式,而不是其维持的关键因素。驱动AF的局部兴奋可以使一个或多个局灶的自律性升高或触发活动,但更可能是位于心房某个固定解剖部位(特别是肺静脉前庭部位)具有完整折返环路的折返激动。本文就室上性心律失常,包括房室折返性心动过速(atrioventricular reentrant tachycardia,AVRT)、心房扑动(atrial flutter,AFL)、房室交界区折返性心动过速(atrloventricularnodal reentrant tachycardia。AVNRT)和局灶性房性心动过速与AF的关系作一分析和阐述。
作者 何燕 韩明华
出处 《中国心血管病研究》 CAS 2007年第2期155-157,共3页 Chinese Journal of Cardiovascular Research
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参考文献16

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