Premium
A Wide QRS Complex, Long RP Tachycardia:
Author(s) -
MORADY FRED
Publication year - 1997
Publication title -
journal of cardiovascular electrophysiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.193
H-Index - 138
eISSN - 1540-8167
pISSN - 1045-3873
DOI - 10.1111/j.1540-8167.1997.tb01007.x
Subject(s) - medicine , center (category theory) , tachycardia , citation , library science , cardiology , computer science , chemistry , crystallography
A 78-year-old man underwent an electrophysiologic procedure because of a 25-year history of recurrent episodes of paroxysmal tachycatdia. A wide QRS complex tachycardia that had a long RP interval wa.s induced by ventricular pacing (Fig. 1). The cycle length of the tachycardia was 540 msec. An atrial extrastitiiulus introduced in the high right atrium during the first half of diastole terminated the tachycaidia (Fig. 2). The tachycardia also was tenninated by ventricular pacing at a cycle length of 340 msec (Fig. 3). What is the tachycardia mechanism?