Systems and methods for estimating left atrial pressure (LAP) in patients with acute mitral valve regurgitation for use by an implantable medical device
Dan E. Gutfinger;Fujian Qu;Riddhi Shah;Yelena Nabutovsky;Alex Soriano;Ryan Rooke
发明人:
Dan E. Gutfinger,Fujian Qu,Alex Soriano,Ryan Rooke,Yelena Nabutovsky,Riddhi Shah
申请号：
US12853157
公开号：
US08135468B2
申请日:
2010.08.09
申请国别(地区):
US
年份:
2012
代理人:
摘要：
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.
