×

Ischemia detection using heart sound timing

  • US 7,736,319 B2
  • Filed: 01/19/2007
  • Issued: 06/15/2010
  • Est. Priority Date: 01/19/2007
  • Status: Active Grant
First Claim
Patent Images

1. A device comprising:

  • a heart sound sensor configured to produce a heart sound signal representative of a heart sound, the heart sound associated with mechanical cardiovascular activity of a heart of a subject; and

    a signal analyzer circuit in electrical communication with the heart sound sensor, wherein the signal analyzer circuit is configured to;

    establish a baseline value of a time interval between a first detected physiologic cardiovascular event and at least one second detected physiologic cardiovascular event, wherein the first and second detected events occur during a same cardiac cycle, wherein at least one of the first and second detected physiologic cardiovascular events includes a heart sound event detected using the heart sound signal, and wherein the other of the first and second detected physiologic cardiovascular events is associated with a different event;

    after establishing the baseline, then monitor the time interval over a plurality of cardiac cycles; and

    determine that an ischemic event occurred using information about how quickly a specified change from the established baseline time interval value occurs during the monitored plurality of cardiac cycles.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×