Table 1: Diagnostic criteria for complete right bundle branch block.


QRS duration greater p95 or greater than 100 ms in children ages 4 to 16 years, and greater than 90 ms in children less than 4 years of age.


rsr′, rsR′, or rSR′ in leads V1 or V2. The R′ or r′ deflection is usually wider than the initial R wave. In a minority of patients, a wide and often notched R wave pattern may be seen in lead V1 and/or V2.


S wave of greater duration than R wave.


Normal R peak time in leads V5 and V6 but greater than 50 ms in lead V1.