Complete atrioventricular block, retrograde atrial activation and intra-atrial block.
A case of complete atrioventricular block, retrograde atrial activation, and intra-atrial block was reported. Inhomogeneous inhibition of the atrioventricular junction and the so-called summation of impulses may both act together to make retrograde conduction possible when third-degree atrioventricular block was present. In lead 2, P waves were dome-shaped, and in lead V1, P waves were biphasic; narrow and peaked P waves intermittently appeared, denoting third-degree intra-atrial block. The peaked P waves signified that the right atrium was activated while the left atrium was not depolarized.
Chen
W C
WC
Shanghai Sixth People's Hospital, China.
Zeng
Z R
ZR
Yao
J
J
D001283:Atrioventricular Node / Q000503:physiopathology*; D004562:Electrocardiography; D005260:Female; D006325:Heart Atria; D006327:Heart Block / Q000503:physiopathology*; D006329:Heart Conduction System / Q000503:physiopathology*; D006801:Humans; D008875:Middle Aged