Implanting an atrial pacemaker

: Twelve single chamber atrial demand (AAI) pacemakers have been implanted for the control of the symptomatic sick sinus syndrome and hypersensitive carotis sinus syndrome at the Postgraduate Medical University during the last year. The patient selection was based upon the long-term monitoring and the electrophysiological studies. In the presence of the intact atrioventricular conduction the "pysiological" pacing has been maintained using "J" shaped endocavital atrial electrodes being connected with simple or multiprogrammable generators. Late AV block was not observed. Authors propose the spreading of AAI stimulation due to its hemodynamical advantages comparing with VVI pacing.