Introduction: Numerous factor can precipitate progression of incomplete heart block to complete heart block in the perioperative period. While there is a consensus of the indications of acute temporary pacing, there is no widely accepted guidelines for the elective perioperative temporary pacing. The indications are clear in the cases of second or third degree atrio-ventricular block, bradycardias, bradyarrhythmias with frequency less than 50/min not responding to atropine, but there are many debate in the cases of first degree atrio-ventricular block with bifascicular or left bundle branch block.
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