Pacemaker system and method for measuring and monitoring cardiac activity and for determining and maintaining capture

摘要: A system for determining P-wave and R-wave capture in response to pacemaker supplied electrical stimuli. One embodiment includes a conventional bipolar atrial lead having tip electrode, connected pace/sense amplifier pulse output circuits within an implantable pacemaker, ring spaced apart from the sensing EGM pacemaker. The bandpass characteristics of allow detection frequencies absence stimulation pulses. all atrium chosen. Output signals these two amplifiers are selectively telemetered external receiver, where occurrence pulses P-waves can be monitored. In operation, if constant time intervals between monitored occurrences present, has occurred. event variable intervals, not occurred magnitude increased until does occur. An alternative measures this differential makes adjustment automatically. Other embodiments use same manual or automatic systems determine capture.