Etiologies-wide-complex tachycardias (WCTS)

(Lancet 2012;380:1520)

• Ventricular tachycardia (VT): accounts for 80% of WCT in unselected population
• SVT conducted with aberrancy: either fixed BBB, rate-dependent BBB (usually RBBB), conduction via an accessory pathway or atrially triggered ventricular pacing