not-yet-known not-yet-known not-yet-known unknown Table one: baseline clinical and electrocardiographical characteristics of the studied patients. BMI= body mass index. EP study = electrophysiological study. First degree AV block = PR segment branch block. Bifascicular block = RBBB + LAFB (left anterior fascicle block). Trifascicular block = 1st degree AV block + LAFB + RBBB.