Reappraisal of the traditional Wenckebach phenomenon with a modified ladder diagram.
作者信息
Barold S Serge, Stroobandt Roland X, Sinnaeve Alfons F, Andries E, Herweg Bengt
机构信息
Florida Heart Rhythm Institute, Tampa, FL, USA.
出版信息
Ann Noninvasive Electrocardiol. 2012 Jan;17(1):3-7. doi: 10.1111/j.1542-474X.2011.00474.x.
Abstract
Understanding of the traditional Wenckebach phenomenon is enhanced by using a modified ladder diagram where AV conduction in any cycle is represented by a slanted line in the AV bar together with similar AV conduction lines of all the preceding cycles. The diagram facilitates calculation of the duration of RR intervals (equal to the basic PP or sinus interval minus the PR or AV increment applied to this particular cycle) and the duration of the pause (equal to 2 × PP or sinus interval minus the sum of all the increments applied to the AV delay). The modified Wenckebach diagram should help students understand the mysterious clustering of QRS complexes or "paradoxical" increase of the ventricular rate that occurs during a Wenckebach sequence.
摘要
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