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Similar QRS Morphology in Sinus Rhythm and Ventricular Tachycardia
Author(s) -
HAROLD S. SERGE,
ROSS DAVID L.,
VOHRA JITU K.,
SLOMAN J. GRAEME
Publication year - 1979
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.1540-8159.1979.tb05224.x
Subject(s) - medicine , cardiology , sinus rhythm , ventricular tachycardia , qrs complex , electrocardiography , tachycardia , coronary artery disease , left bundle branch block , digitalis , right bundle branch block , atrial fibrillation , heart failure
A 74‐year‐old man with coronary artery disease and bifascicular block suffered from recurrent tachycardia. Although the similarity of QRS morphology in tachycardia and sinus rhythm suggested a supravenlricular origin, His bundle electrocardiography and programmed stimulation showed a ventricular origin. Digitalis toxicity was not an etiological factor and there was no evidence to suggest a His bundle tachycardia. The case illustrates that in occasional circumstances the onset of ventricular tachycardia may produce no change in QRS morphology thus malting the diagnosis by conventional electrocardio‐graphic criteria difficult.