Patent ID: 9174056
Filing Date: 2015-11-03
Classification: A61N

Abstract:
1. A dual-chamber pacemaker comprising: an atrial electrode adapted to be connected to the right atrium of the human heart of a patient, at least one first ventricular electrode adapted to be connected to the right ventricle of the human heart, and a control system that has been arranged to emit, in the course of each cardiac stimulation cycle: a first impulse for the stimulation of the right atrium by means of the atrial electrode, a second impulse for a first stimulation of the right ventricle, said first stimulation being defined below-threshold pre-stimulation, by means of the at least one first ventricular electrode, said second impulse being emitted after a time interval T1 from the emission of the first impulse, this second impulse having a voltage comprised between 0.5 and −3Volt and which is not in excess of 80-90% of the cardiac stimulation threshold potential of the patient, a third impulse for a second stimulation of the right ventricle, emitted after a time interval T2 from the predefined pre-stimulation second impulse, said time interval T2 being comprised between 50 and 400 msec, said third impulse having a voltage adapted to provoke the cardiac stimulation of the patient; wherein the dual-chamber pacemaker does not include any electrode in the left ventricle of the human heart.