Syndrome du pacemaker en mode double chambre : conséquence d'un temps d'activation atriale très allongéPacemaker syndrome after dual-chamber device implantation: consequence of a very long atrial activation delay

: Many circumstances, generally occurring in inappropriate device's adjustment or in specific myocardial conduction's disturbances, can result in dual chamber indications in pace maker syndromes. Our case report is about a man implanted with a dual chamber device with a dilated right atrium and intra atrial conduction delay resulting in a delayed post pacing atrial activation time. The consequence was an atrial contraction occurring during closed atrioventricular valves.