Transient, complete atrioventricular block following a nonpenetrating chest trauma

Cardiac contusion may cause disorders of impulse formation and propagation in the specific conduction system. Transient complete atrioventricular bloc k following a nonpenetrating chest trauma is a rare complication. We descri be the case of a patient who presented a transient complete atrioventricula r block, and later a transient right bundle branch block and a left anterio r hemiblock, following a nonpenetrating chest trauma due to a car accident. The difficulty for diagnosing myocardial contusion is pointed out, and the usefulness of the electrophysiological study for detecting baseline conduc tion system disorders is discussed.