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Methods and systems that monitor for an impending myocardial infarction

  • US 8,672,855 B2
  • Filed: 07/08/2009
  • Issued: 03/18/2014
  • Est. Priority Date: 07/08/2009
  • Status: Active Grant
First Claim
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1. For use with an implanted system, a method for monitoring for an impending myocardial infarction (MI), the method comprising:

  • (a) using an implanted photoplethysmography sensor remote from the patient'"'"'s heart to produce a photoplethysmography signal that is indicative of changes in arterial volume;

    (b) for each of a plurality of periods of time, determining a metric indicative of the area under the curve of the photoplethysmography signal for the period of time;

    (c) monitoring for an impending MI based on changes in the metric indicative of the area under the curve of the photoplethysmography signal; and

    (d) triggering an alert and/or therapy in response to an impending MI being detected at step (c);

    wherein one or more of steps (b), (c) and (d) is/are performed using a processor.

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