[Optimized sequential pacing of atrium and ventricle (author's transl].

A new stimulation system for pacemaker is described, which was implanted in a 49 years old patient. The new pacemaker stimulates the atrium when needed, the ventricle when needed and both when needed and can be inhibited completely. At a faster atrial activity and disturbed atrio-ventricular conduction the pacemaker synchronizes the ventricle at the appropriate rate. Thus the optimized stimulation comes very near to the physiologic rhythm of the heart.