Open AccessCan Dispersion of the QT Interval Identify Inducible Monomorphic Versus Polymorphic Ventricular Tachycardia?
Author(s) -
Clay Anthony,
Dreifus Leonard S.,
Zaim Sina,
Kutalek Steven P.
Publication year - 1998
Publication title -
annals of noninvasive electrocardiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.494
H-Index - 48
eISSN - 1542-474X
pISSN - 1082-720X
DOI - 10.1111/j.1542-474x.1998.tb00025.x
Subject(s) - medicine , qt interval , ventricular tachycardia , cardiology , long qt syndrome , precordial examination , ventricular fibrillation , electrocardiography , tachycardia , anesthesia
Background Dispersion of QT interval has been utilized to stratify patients who may be at risk for lethal ventricular arrhythmias. This study attempted to evaluate the value of QT dispersion in patients undergoing electrophysiological studies (EPSs) to predict inducible monomorphic ventricular tachycardia (MVT) or polymorphic ventricular tachycardia or ventricular fibrillation (PMVT/VF). Methods EPSs were performed on 33 patients with a history of symptomatic MVT and PMVT/VF. Seventeen patients were induced by EPS to MVT and 13 patients to PMVT/VF; three other patients could not be induced. The QT limb (QT L , QT CL ), precordial (QT P , QT cP ) and dispersion measurements, and limb (QT Ld , QT cLd , JT Ld ) and precordial (QT pd , QT cPd , JT Pd ), were analyzed by two independent observers. Except for the QT P which appeared longer in patients with PMVT/VF than in patients with MVT (468 ± 124 vs 410 ± 41.8 ms, P < 0.05), there was no statistical difference between the QT, QT c , QT d , JT d and induced MVT vs PMVT/VF. Conclusion Our data suggest that QT dispersion considering limb leads, precordial leads, or a combination of all leads did not predict inducible MVT vs PMVT/VF in patients presenting with serious index ventricular arrhythmias. A.N.E. 1998; 3(1):20–24