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Far-field P-wave sensing in near real-time for timing delivery of pacing therapy in a cardiac medical device and medical device system
Far-field P-wave sensing in near real-time for timing delivery of pacing therapy in a cardiac medical device and medical device system
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机译:在心脏医疗设备和医疗设备系统中以近乎实时的方式进行远场P波传感,以定时进行起搏治疗
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摘要
A medical device system for controlling ventricular pacing therapy during cardiac resynchronization therapy that includes a sensing device to sense a cardiac signal and emit a trigger signal in response to the sensed cardiac signal, a therapy delivery device to deliver the ventricular pacing in response to the emitted trigger signal, and a processor configured to identify a fiducial point of the cardiac signal sensed in real-time, set a window comprising a start point positioned a first distance prior to the fiducial point and an endpoint positioned a second distance less than the first distance subsequent to the fiducial point, determine a signal characteristic of the cardiac signal within the window, determine whether a P-wave is detected in response to the signal characteristic, determine whether an atrio-ventricular interval timer has expired, and emit a trigger signal to deliver the ventricular pacing timed off of the local maximum in response to the P-wave being detected and not timed off of the local maximum in response to the timer being expired.
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