摘要 |
<p>This disclosure relates to monitoring intracardiac or vascular impedance to determine a change in hemodynamic status by detecting changes in an impedance parameter over cardiac cycles. An example method includes measuring a plurality of impedance values of a path within a patient over time, wherein the path includes at least one blood vessel or cardiac chamber of the patient, and wherein the impedance values vary as a function of blood pressure within the at least one vessel or chamber, determining a plurality of values of an impedance parameter over time based on the measured impedance values, wherein each of the impedance parameter values is determined based on a respective sub-plurality of the impedance values, comparing at least one of the impedance parameter values to at least one prior impedance parameter value, and identifying a change in a cardiovascular parameter related to the blood pressure based on the comparison.</p> |
申请人 |
MEDTRONIC, INC.;ZIELINSKI, TODD, M.;HETTRICK, DOUGLAS, A.;ROUW, MATTIAS |
发明人 |
ZIELINSKI, TODD, M.;HETTRICK, DOUGLAS, A.;ROUW, MATTIAS |