×

Measurement of cardiac cycle length and pressure metrics from pulmonary arterial pressure

  • US 9,314,205 B2
  • Filed: 04/28/2011
  • Issued: 04/19/2016
  • Est. Priority Date: 04/28/2011
  • Status: Active Grant
First Claim
Patent Images

1. A method of monitoring a cardiovascular pressure signal in a medical device, comprising:

  • sensing and high pass filtering the cardiovascular pressure signal, by the medical device, to generate a resulting sensed pressure signal;

    determining, by the medical device, whether a first derivative of the sensed pressure signal is greater than a first pressure threshold;

    determining, by the medical device, a first maximum of the determined first derivative of the pressure signal in response to the first derivative of the sensed pressure signal being greater than the first pressure threshold;

    determining, by the medical device, whether the first derivative of the sensed pressure signal is greater than a second pressure threshold not equal to the first pressure threshold;

    determining, by the medical device, a second maximum of the determined first derivative of the pressure signal in response to the first derivative of the sensed pressure signal being greater than the second pressure threshold;

    determining, by the medical device, at least one of a systolic pressure or a diastolic pressure, wherein the at least one of a systolic pressure or a diastolic pressure is determined based on the first maximum of the first derivative signal in response to the pressure signal not being greater than the second threshold, and based on the second maximum of the first derivative signal in response to the pressure signal being greater than the second threshold; and

    controlling delivery of at least one of electrical stimulation and a therapeutic agent in response to the determined at least one of a systolic pressure or a diastolic pressure.

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