Patent ID: 6937902
Filing Date: 2005-08-30
Classification: A61N

Abstract:
1. A cardiac pacemaker comprising: a pulse generator which emits stimulation pulses adapted for delivery to a heart in a patient; a control unit connected to said pulse generator for controlling emission of said stimulation pulses by said pulse generator; an altering unit in said control unit for altering an AV-delay associated with said stimulation pulses from a predetermined first AV-delay value to a predetermined second AV-delay value, and back to said first AV-delay value; a sensor adapted to interact with said patient to measure a parameter related to cardiac output of said patient, said sensor measuring said parameter in a first time window within a time of operation with said first AV-delay value, and in a second time window within a time of operation with said second AV-delay value, and in a third time window within a time of operation after the return back to said first AV-delay value; a calculating unit which calculates respective average values of said parameter in said first, second and third time windows; and a determining unit supplied with said average values for determining which of said first and second AV-delay values results in a higher cardiac output, said determining unit being connected to said control unit and said control unit then controlling said pulse generator to operate with said AV-delay value that results in a higher cardiac output.