Patent ID: 8548588

Claim:
A computer-based system for blocking the ventricular pacing activity of a CRM subject's associated with CRM device so as to assure such blocking during the entirety of the ventricular relative refractory period in each of the CRM subject's cardiac cycles—with the beginning and the ending of the overall period of such blocking in each cardiac cycle being system-defined to lie, respectively, (a) within the real-time, ventricular depolarization window in the cycle, and (b) at the time of the real-time, S2 heart-sound, plus or minus any user-defined time-delta, said system comprising a signal-processing structure having information input structure adapted to receive, for processing, real-time, cardiac-cycle-specific ECG and heart-sound information derived from such a CRM subject, and an output for supplying processed ECG and heart-sound information, and control-signal-generating structure disposed downstream from said signal-processing structure, including an input operatively connected to said output for receiving processed information therefrom, and for generating, in relation to such received, processed information, a CRM pacing control signal designed to effect CRM-device pacing-activity blocking during the mentioned overall period of such blocking.