Premium
Early Afterdepolarization in a Patient with Complete Atrioventricuiar Block and Torsades de Pointes
Author(s) -
KURITA TAKASHI,
OHE TOHRU,
SHIMIZU WATARU,
HOTTA DAISUKE,
SHIMOMURA KATSURO
Publication year - 1993
Publication title -
pacing and clinical electrophysiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.686
H-Index - 101
eISSN - 1540-8159
pISSN - 0147-8389
DOI - 10.1111/j.1540-8159.1993.tb01532.x
Subject(s) - medicine , torsades de pointes , afterdepolarization , cardiology , heart block , block (permutation group theory) , long qt syndrome , qt interval , electrocardiography , electrophysiology , repolarization , geometry , mathematics
We present a patient with complete atrioventricuiar block and torsades de pointes in whom earJy afterdepolarization (EAD) was demonstrated in right ventricular monophasic action potentials (MAPs). In an emergency situation, MAPs were recorded after the suppression of torsades de pointials magnesium injection. EADs were observed at three out of five right ventricular sites during escape rhythm. Thus, magnesium aboJisiied the tachycardia without shortening the QT interval and probably without suppressing EAD. Right ventricular pacing and the injection of lidocaine (50 mg) suppressed EAD and shortened the QT interval.