Systems and methods for infarct detection
First Claim
1. A method of sensing for an occurrence of a myocardial infarction in a patient'"'"'s heart using a leadless cardiac pacemaker that is affixed to the patient'"'"'s heart, the method comprising:
- sensing, by the leadless cardiac pacemaker, a baseline first sensor signal generated via a first sensor of the leadless cardiac pacemaker during a baseline period, the first sensor comprising one or more of a cardiac electrical signal sensor, a heart sound sensor, and an isovolumic contraction period sensor;
sensing, by the leadless cardiac pacemaker, a baseline accelerometer signal generated via an accelerometer of the leadless cardiac pacemaker during the baseline period that reflects movement of the patient'"'"'s heart during the baseline period;
determining a baseline template based on one or more characteristics of the baseline first sensor signal and the baseline accelerometer signal;
storing the baseline template in a memory;
sensing, by the leadless cardiac pacemaker, the baseline first sensor signal generated via the first sensor during a first test period subsequent to the baseline period;
determining a first test template based on one or more characteristics of the first sensor signal during the test period;
comparing the first test template with the baseline template, and based on the comparison, determining if a myocardial infarction may have occurred in the patient'"'"'s heart;
when it is determined that a myocardial infarction may have occurred in the patient'"'"'s heart, then;
sensing, by the leadless cardiac pacemaker, the accelerometer signal generated via the accelerometer during a second test period subsequent to the first test period that reflects movement of the patient'"'"'s heart during the second test period;
determining a second test template based on one or more characteristics of the accelerometer signal during the second test period;
comparing the second test template with the baseline template, and based on the comparison, determining if a myocardial infarction occurred in the patient'"'"'s heart;
communicating information from the leadless cardiac pacemaker to an external device; and
when it is determined that a myocardial infarction occurred in the patient'"'"'s heart based on the comparison of the second test template with the baseline template, displaying an indication on a display of the external device that a myocardial infarction occurred in the patient'"'"'s heart.
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Abstract
Systems, devices, and methods for determining occurrences of myocardial infarctions are disclosed. In one embodiment, a method of sensing for an occurrence of a myocardial infarction may include sensing a baseline accelerometer signal during a baseline, determining a baseline template based on one or more characteristics of the baseline accelerometer signal, and storing the baseline template in a memory. The method may further include sensing an accelerometer signal during a test period subsequent to the baseline, determining a test template based on one or more characteristics of the accelerometer signal during the test period, and comparing the baseline template with the test template, and based on the comparison, determining if a myocardial infarction occurred in the patient'"'"'s heart. If it is determined that a myocardial infarction occurred in the patient'"'"'s heart, the method may further include displaying an indication on a display that a myocardial infarction occurred.
1109 Citations
16 Claims
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1. A method of sensing for an occurrence of a myocardial infarction in a patient'"'"'s heart using a leadless cardiac pacemaker that is affixed to the patient'"'"'s heart, the method comprising:
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sensing, by the leadless cardiac pacemaker, a baseline first sensor signal generated via a first sensor of the leadless cardiac pacemaker during a baseline period, the first sensor comprising one or more of a cardiac electrical signal sensor, a heart sound sensor, and an isovolumic contraction period sensor; sensing, by the leadless cardiac pacemaker, a baseline accelerometer signal generated via an accelerometer of the leadless cardiac pacemaker during the baseline period that reflects movement of the patient'"'"'s heart during the baseline period; determining a baseline template based on one or more characteristics of the baseline first sensor signal and the baseline accelerometer signal; storing the baseline template in a memory; sensing, by the leadless cardiac pacemaker, the baseline first sensor signal generated via the first sensor during a first test period subsequent to the baseline period; determining a first test template based on one or more characteristics of the first sensor signal during the test period; comparing the first test template with the baseline template, and based on the comparison, determining if a myocardial infarction may have occurred in the patient'"'"'s heart; when it is determined that a myocardial infarction may have occurred in the patient'"'"'s heart, then; sensing, by the leadless cardiac pacemaker, the accelerometer signal generated via the accelerometer during a second test period subsequent to the first test period that reflects movement of the patient'"'"'s heart during the second test period; determining a second test template based on one or more characteristics of the accelerometer signal during the second test period; comparing the second test template with the baseline template, and based on the comparison, determining if a myocardial infarction occurred in the patient'"'"'s heart; communicating information from the leadless cardiac pacemaker to an external device; and when it is determined that a myocardial infarction occurred in the patient'"'"'s heart based on the comparison of the second test template with the baseline template, displaying an indication on a display of the external device that a myocardial infarction occurred in the patient'"'"'s heart. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of sensing for an occurrence of a myocardial infarction in a patient'"'"'s heart using a leadless cardiac pacemaker that is affixed to the patient'"'"'s heart, the method comprising:
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determining when one or more baseline conditions exist; when the one or more baseline conditions exist, then; sampling, by the leadless cardiac pacemaker, a baseline accelerometer signal generated via an accelerometer of the leadless cardiac pacemaker during a baseline period that reflects movement of the patient'"'"'s heart during the baseline period; storing in a memory one or more characteristics of the baseline accelerometer signal sensed during the baseline period; after storing in the memory the one or more characteristics of the baseline accelerometer signal sensed during the baseline period, determining when the one or more baseline conditions again exist; when the one or more baseline conditions again exist; sampling, by the leadless cardiac pacemaker, an accelerometer signal generated via the accelerometer that reflects movement of the patients'"'"' heart during a test period; comparing one or more characteristics of the accelerometer signal sampled during the test period with the one or more characteristics of the baseline accelerometer signal sampled during the baseline period, and based on the comparison, determining if a myocardial infarction occurred in the patients'"'"' heart; communicating information from the leadless cardiac pacemaker to an external device; and when it is determined that a myocardial infarction occurred in the patient'"'"'s heart, displaying an indication on a display of the external device that a myocardial infarction occurred in the patient'"'"'s heart. - View Dependent Claims (12, 13, 14, 15, 16)
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Specification