Method of verifying capture of the atrium by a cardiac stimulato

Details Method of verifying capture of the atrium by a cardiac stimulato Method of verifying capture of the atrium by a cardiac stimulato

1995-12-18

1996-11-05

Kamm, William E.

Surgery: light, thermal, and electrical application

Light, thermal, and electrical application

Electrical therapeutic systems

607 26, A61N 137

Patent

active

055711448

ABSTRACT:
A method of verifying whether an atrium of the heart has been captured by an atrial cardiac stimulation pulse. An atrial signal is sensed via an electrode located in the atrium during a period of time from before delivery of the stimulation pulse to after delivery of the stimulation pulse. The sensed signal is analyzed by detecting whether a P-wave occurred prior to delivery of the cardiac stimulation pulse such that stimulation pulse would have been delivered within a refractory period. If a P-wave did not occur, the slope of the sensed waveform signal is determined within a selected interval of time beginning at a selected time after the time of delivery of the stimulation pulse. A capture status signal is generated that indicates non-capture, if a P-wave was detected, or capture, if a P-wave component was not detected and the determined slope of the sensed waveform signal surpasses a pre-selected slope threshold demarcating capture from non-capture.

REFERENCES:
patent: 4686988 (1987-08-01), Sholder
patent: 4858610 (1989-08-01), Callaghan
patent: 5431693 (1995-07-01), Schroeppel
patent: 5443485 (1995-08-01), Housworth et al.

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