Open Accessaccessory atrioventricular pathway, supra ‐, and infrahisian conduction impaired due to mitral annulus calcification
Author(s) -
Kriwisky M.,
Goldstein J.,
Gotsman M. S.
Publication year - 1987
Publication title -
clinical cardiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.263
H-Index - 72
eISSN - 1932-8737
pISSN - 0160-9289
DOI - 10.1002/clc.4960101209
Subject(s) - medicine , wpw syndrome , cardiology , right bundle branch block , accessory pathway , left bundle branch block , bundle branch block , tachycardia , electrical conduction system of the heart , abnormality , mitral annulus , electrocardiography , conduction abnormalities , atrial fibrillation , blood pressure , catheter ablation , heart failure , diastole , psychiatry
Disorders of conduction occurring simultaneously in both normal and accessory pathways of patients with Wolff‐Parkinson‐White (WPW) syndrome have only rarely been observed. To our knowledge this is the first report of impaired conduction in both pathways in WPW syndrome due to mitral annulus calcification (MAC). This case of WPW syndrome type A presented the following conduction abnormalities: (1) right bundle‐branch block; (2) transient second‐degree AV block with prolonged PR interval of the conducted beats; (3) during electrophysiological study, induction of tachycardia, dependent (phase 3) second‐degree AV block, and occasionally conduction of two consecutive beats, the second showing an increased H‐V interval (from 25 to 60 ms) and left bundle‐branch block (LBBB) pattern, due to (4) infrahisian conduction abnormality.