Method and apparatus for cardiac function monitoring

摘要

An implantable medical device that includes a first elongated lead body having an outer surface and an opening along the outer surface, a sensor positioned along the lead body and configured to receive acoustic signals through the opening of the first lead body and generate an electrical signal representative of sounds produced at a targeted location along a patient's cardiovascular system. A therapy delivery module is capable of delivering a cardiac therapy via predetermined electrodes of a plurality of electrodes, and a processor is configured to detect a cardiac event in response to the sensed cardiac electrical signals, determine a plurality of time intervals between the electrical signals and acoustic signals, determine a correlation between the electrical signals and the acoustic signals, and control the therapy delivery module to deliver therapy in response to the determined correlation.

主权项

1. A medical device, comprising:
a first elongated lead body having an outer surface and an opening along the outer surface; a first sensor positioned along the lead body and configured to receive acoustic signals through the opening of the first lead body and generate an electrical signal representative of sounds produced at a targeted location along a patient's cardiovascular system; a plurality of electrodes for sensing cardiac electrical signals; a therapy delivery module for delivering a cardiac therapy via predetermined electrodes of the plurality of electrodes; and a processor configured to:
detect a plurality of first cardiac events in response to the sensed cardiac electrical signals,detect a plurality of second cardiac events in response to the acoustic signals;determine a first plurality of time intervals between the plurality of first cardiac events and the plurality of second cardiac events,determine a first correlation between the plurality of first cardiac events and the plurality of second cardiac events in response to the first plurality of time intervals,responsive to the plurality of first cardiac events and the plurality of second cardiac events being correlated, detect a plurality of third cardiac events and a plurality of fourth cardiac events, wherein at least one of the plurality of third cardiac events and the plurality of fourth cardiac events are detected from the acoustic signals;determine a second plurality of time intervals between the plurality of third cardiac events and the plurality of fourth cardiac events;determine a second correlation between the plurality of third cardiac events and the plurality of fourth cardiac events in response to the second plurality of time intervals, andcontrol the therapy delivery module to deliver therapy in response to the determined second correlation.