title: Reliability of QRS duration and morphology on surface electrocardiogram to identify ventricular dyssynchrony in patients with idiopathic dilated cardiomyopathy.
abstract: Using Fourier phase analysis of equilibrium radionuclide angiography in both ventricles, inter- and intraventricular delays were correlated with QRS morphology and duration in 103 patients with idiopathic dilated cardiomyopathy. We found that left bundle branch block on the left axis may reflect a high intra-left ventricular dyssynchrony. A precise evaluation of the dyssynchrony appears useful because a high proportion of patients with incomplete bundle branch block, left anterior hemiblock, or "normal" QRS exhibit a marked intra-LV dyssynchrony and may respond to cardiac resynchronization therapy.
authors.affiliation: Services de Cardiologie B, Tours, France. lfau@med.univ-tours.fr
authors.forename: Laurent
authors.initials: L
authors.lastname: Fauchier
authors.forename: Olivier
authors.initials: O
authors.lastname: Marie
authors.forename: Danielle
authors.initials: D
authors.lastname: Casset-Senon
authors.forename: Dominique
authors.initials: D
authors.lastname: Babuty
authors.forename: Pierre
authors.initials: P
authors.lastname: Cosnay
authors.forename: Jean Paul
authors.initials: JP
authors.lastname: Fauchier
mesh_terms: D002037:Bundle-Branch Block / Q000175:diagnosis / Q000209:etiology; D002311:Cardiomyopathy, Dilated / Q000150:complications*; D003643:Death; D004562:Electrocardiography; D005260:Female; D005500:Follow-Up Studies; D015637:Gated Blood-Pool Imaging; D016027:Heart Transplantation; D006801:Humans; D008297:Male; D008875:Middle Aged; D011237:Predictive Value of Tests; D012016:Reference Values; D015203:Reproducibility of Results; D018754:Ventricular Dysfunction / Q000175:diagnosis* / Q000209:etiology*