Patent ID: 7917194
Filing Date: 2011-03-29
Classification: A61B

Abstract:
1. A method of detecting pulmonary edema in a patient, comprising: determining whether a condition for detecting pulmonary edema is satisfied; acquiring an intracardiac electrogram signal when the condition is satisfied; detecting QRS complexes in the intracardiac electrogram signal; detecting cycle-to-cycle changes in the integral of the QRS complexes; deriving a respiration signal from the cycle-to-cycle changes in the integral of the QRS complexes; deriving a respiration parameter from the respiration signal, wherein the respiration parameter comprises at least one of the group consisting of: an amplitude of the respiration signal and a pulse width of the respiration signal; and comparing the respiration parameter derived from the respiration signal with a baseline parameter to generate an indication of pulmonary edema.