Identical QRS complexes during atrial fibrillation with aberrant conduction and ventricular tachycardia. The value of a His bundle recording.
In a patient with chronic congestive heart failure, right bundle branch block-shaped QRS complexes occurred in salvos during atrial fibrillation. The site of origin of these complexes could not be determined from the 12-lead ECG alone. Recording of a His bundle electrogram showed that both intraventricular aberrant conduction and ventricular tachycardia were responsible for salvos having the same QRS complexes in the 12-lead ECG.
D000368:Aged; D001281:Atrial Fibrillation / Q000503:physiopathology*; D002036:Bundle of His / Q000503:physiopathology*; D002037:Bundle-Branch Block / Q000503:physiopathology; D003937:Diagnosis, Differential; D004562:Electrocardiography / Q000379:methods*; D006329:Heart Conduction System / Q000503:physiopathology*; D006333:Heart Failure / Q000503:physiopathology; D006352:Heart Ventricles / Q000503:physiopathology; D006801:Humans; D008297:Male; D013610:Tachycardia / Q000503:physiopathology*