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An electrocardiographic finding of a wide QRS complex with evidence of delayed conduction to the right ventricle, manifested by a widened initial portion of the QRS in V1 and V2, a widened S wave in V5, V6, I and aVL, and with QRS duration greater than or equal to 120 ms. An RsR\' complex is typically present in leads V1 and V2. (CDISC)
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