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Prognosis in Patients with Left Ventricular Dysfunction and Ventricular Tachycardia Following Programmed Ventricular Stimulation
Author(s) -
FLAKER GREG C.,
KROL RYSZARD B.,
ATAY A. ERSIN,
MUSICK WILLIAM,
ALPERT MARTIN A.,
ANDERSON SHARON
Publication year - 1991
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.1540-8167.1991.tb01709.x
Subject(s) - medicine , ventricular tachycardia , cardiology , ejection fraction , tachycardia , ventricular fibrillation , anesthesia , heart failure
We performed programmed ventricular stimulation on 69 patients with left ventricular ejection dysfunction (ejection fraction < 50%) and clinically recognized ventricular tachycardia including 28 patients with sustained ventricular tachycardia and 41 patients with nonsustained ventricular tachycardia. An inducible arrhythmia (> 6 beats ventricular tachycardia) was found in 74% of patients. Patients with clinically sustained arrhythmias were frequently inducible (89%) with a high incidence of inducible monomorphic ventricular tachycardia (82%). Patients with clinically nonsustained ventricular tachycardia had a lower rate of inducibility (63%) including a high incidence of inducible polymorphic ventricular tachycardia (27%). Inducible patients with left ventricular dysfunction and ventricular tachycardia had a low incidence of electrophysiologically demonstrated effective drug therapy (16%). However, if an effective drug was found, the prognosis was good. Empirical drug therapy was associated with a poor prognosis in inducible and noninducible patients. Finally, an unfavorable prognosis was associated with a clinically sustained arrhythmia, a lower ejection fraction, and the presence of a left ventricular aneurysm. An inducible arrhythmia did not predict an unfavorable course. Indeed, patients with noninducible ventricular tachycardia in this group of patients were still at risk for sudden cardiac death.