Key result
In three patients with Wenckebach type second degree AV block, manifest AV nodal reentry commonly presented as an incomplete Wenckebach periodicity interrupted by a retrograde impulse.
Case Report (n=3)
Combined AV nodal Wenckebach periodicity and reentry can manifest as incomplete Wenckebach cycles or sudden PR interval increases on ECG.
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Should not change ECG interpretation in AV block; hypothesis-generating case observations leave the role of nodal reentry open.
SCHWEITZER, P.: The Electrocardiographic Manifestation of Combined AV Nodal Wenckehach Periodicity and Reentry Presented are three patients with Wenckebach type second degree AV block that was complicated with AV nodal reentry producing different arrhythmias. The common presentation of manifest AV nodal reentry is an incomplete Wenckebach periodicity, whereby the retrograde impulse interrupts the Wenckebach cycle; rarely, the retrograde impulse initiates an AV junctional reentrant tachycardia. The documentation of concealed AV nodal reentry is more difficult and should be considered if there is a sudden increase of the PR interval in the Wenckebach cycle.
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Paul Schweitzer (1989) conducted a case report in Wenckebach type second degree AV block complicated with AV nodal reentry (n=3). In three patients with Wenckebach type second degree AV block, manifest AV nodal reentry commonly presented as an incomplete Wenckebach periodicity interrupted by a retrograde impulse.
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