Dynamics of, and alternating Wenckebach periods during, 4:1 and 6:1 atrioventricular block.
In summary, the irregular dynamics of progression of 4:1 AV block in atrial flutter, presumably different from those observed in similar degrees of rate-dependent block, most likely reflected the complex electrophysiologic mechanisms operating during the highest degrees of AV nodal block. Occurrence of previously undescribed arrhythmias, namely Wenckebach periods during 4:1 and 6:1 block, tends to support the multilevel block hypothesis.
Castellanos
A
A
University of Miami School of Medicine, Florida 33101, USA.
Moleiro
F
F
Saoudi
N
N
Interian
A
A
Myerburg
R J
RJ
D001282:Atrial Flutter / Q000150:complications / Q000503:physiopathology; D001283:Atrioventricular Node / Q000503:physiopathology; D004562:Electrocardiography; D004594:Electrophysiology; D006327:Heart Block / Q000150:complications / Q000503:physiopathology*; D006801:Humans; D017711:Nonlinear Dynamics; D013997:Time Factors