Systems and methods for estimating left atrial pressure (LAP) in patients with acute mitral valve regurgitation for use by an implantable medical device
First Claim
1. A method for estimating cardiac pressure within a patient for use with an implantable medical device, the method comprising:
- detecting an indication of acute mitral valve regurgitation (MR), if occurring within the patient;
applying an electrical field to tissues of the patient including cardiac tissues and measuring an electrical parameter influenced by the applied electrical field and affected by cardiac pressure; and
estimating cardiac pressure within the patient based on the electrical parameter and the indication of acute MR.
1 Assignment
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Accused Products
Abstract
Various techniques are provided for use with an implantable medical device for estimating cardiac pressure within a patient based on admittance (or related electrical values such as impedance or conductance) that takes into account the presence of acute MR within the patient. Briefly, the device detects an indication of acute MR, if occurring within the patient. The device also applies electrical fields to tissues of the patient and measures electrical parameters influenced by the electrical field, such as admittance, impedance or conductance. The device then estimates cardiac pressure within the patient based on the measured electrical parameter and the indication of acute MR. In one example, different linear correlation functions are used to convert admittance values to left atrial pressure (LAP) values depending upon the presence or absence of acute MR within the patient.
29 Citations
20 Claims
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1. A method for estimating cardiac pressure within a patient for use with an implantable medical device, the method comprising:
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detecting an indication of acute mitral valve regurgitation (MR), if occurring within the patient; applying an electrical field to tissues of the patient including cardiac tissues and measuring an electrical parameter influenced by the applied electrical field and affected by cardiac pressure; and estimating cardiac pressure within the patient based on the electrical parameter and the indication of acute MR. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A system for use with an implantable medical device for implant within a patient, the system comprising:
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an acute mitral valve regurgitation (MR) detection system operative to detect an indication of acute MR, if occurring within the patient; an electrical field generator operative to apply an electric field to tissues of the patient including cardiac tissues and further operative to measure an electrical parameter influenced by the applied electrical field and affected by cardiac pressure; and a cardiac pressure estimation system operative to estimate cardiac pressure within the patient based on the electrical parameter and the indication of acute MR.
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20. A system for use with an implantable medical device for implant within a patient, the system comprising:
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means for detecting an indication of acute mitral valve regurgitation (MR), if occurring within the patient; means for applying an electrical field to tissues of the patient including cardiac tissues and measuring an electrical parameter influenced by the applied electrical field and affected by cardiac pressure; and means for estimating cardiac pressure within the patient based on the electrical parameter and the indication of acute MR.
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Specification