Modified Brugada Criteria for Ventricular Tachycardia

*With RBBB QRS:

• In V1, monophasic R, or QR, or RS

• In V6, R/S < 1 or monophasic R or QR

*With LBBB QRS:

• In V1, R > 30 milliseconds wide or RS > 60 milliseconds wide

• In V6, QR or QS

AV = atrioventricular; LBBB = left bundle branch block; msec = millisecond; RBBB = right bundle branch block; VT = ventricular tachycardia.

Data from Brugada P, Brugada J, Mont L, Smeets J, Andries EW. A new approach to the differential diagnosis of a regular tachycardia with a wide QRS complex. Circulation. 1991;83(5):1649-1659. doi:10.1161/01.cir.83.5.1649