Method and system for non-invasive measurement of cardiac parameters

摘要

A method and system are presented for use in assessment of at least one cardiac parameter of an individual. An electrodes arrangement is applied to an individual's body, for applying an electrical field to the body and providing an electrical output indicative of a systolic impedance change and of a velocity of said change during a cardiac cycle. Also provided is additional data indicative of at least of the following conditions of the individual: a value of total peripheral resistance (TPR), a value of cardiac index (CI), and existence of the AHF condition. Data corresponding to these condition is analyzed to determine whether the TPR satisfies a first predetermined condition and/or the CI satisfies a predetermined second condition and/or whether the acute heart failure (AHF) condition is identified, to thereby use the data indicative of the measured electrical output and selectively calculate said at least one cardiac parameter based on either the systolic impedance change data or on said data of the velocity of the impedance change.

主权项

1. A computer implemented method for use in assessment of at least one cardiac parameter of an individual, the method comprising:
receiving, by a processor, measured data provided by a measuring unit and being indicative of a systolic impedance change, ΔR, and of a velocity of said change, δR/δt, of an individual during a cardiac cycle; providing input data indicative of at least one condition of the individual, said at least one condition being indicative of whether the individual is sustained by an acute heart failure (AHF); analyzing, by a processor, said input data indicative of said at least one condition of the individual and utilizing, by the processor, the measured data for calculating the at least one cardiac parameter of the individual, wherein said utilizing of the measured data comprises: upon identifying that said input data is indicative of that the individual is sustained by AHF, using the data of the velocity of impedance change in the calculation, and upon identifying that said input data is indicative of that the individual is not sustained by AHF, either using the data of systolic impedance change in the calculation or analyzing additional input data indicative of at least one other predetermined condition of the individual in order to determine whether to use the systolic impedance change data or the velocity of said change, said at least one other condition comprising at least one of a total peripheral resistance (TPR) value and a cardiac index (CI) value; and generating an output indicative of the calculation result.