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Table 1 Selected differential diagnosis of wide complex tachycardia

From: Asymptomatic wide complex tachycardia: a case report

Condition Characteristics
Ventricular tachycardia (VT) Presence of AV dissociation with more ventricular than atrial events, QRS duration more than 140 ms, fusion beats, capture beats
Supraventricular tachycardia with aberrancy QRS duration of not more than 140 ms [7]
EKG artifacts Hemodynamically stable, normal QRS complexes, "precipitating" cause viz. movements
Pre-excitation tachycardia Presence of "delta wave", short PR interval
Ventricular fibrillation No apparent rate, fibrillatory waves, absent pulse, unrecordable BP