Two Conditions Must Exist to Suspect Bundle Branch Block

Two conditions must exist to suspect bundle branch block.First,the QRS complex must have an abnormal duration (0.12 seconds or more in width) ,and second _____.

A) an RSR' complex must be seen in leads V1-V6
B) a QS pattern must be seen in leads I,II,and III
C) a slurred upstroke of the QRS complex must exist
D) the QRS complex must arise as the result of supraventricular activity

Correct Answer:

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