criteria suggestive of ventricular tachycardia included atrioventricular dissociation , positive qrs concordance , axis less than -90 deg to +/- 180 deg , combination of left bundle branch block and right axis , qrs duration of greater than 140 ms with right bundle branch block and greater than 160 ms with left bundle branch block and , a different qrs during tachycardia compared to baseline preexisting bundle branch block .
C0042514
ventricular tachycardia
C0039231
tachycardia