Patent ID: 7822470

Claim:
A method of determining the left-ventricular ejection time T LVE of a heart of a subject, comprising: deriving a first waveform for determining T LVE including measuring a value selected from the group consisting of thoracic electrical bioimpedance and thoracic electrical bioadmittance over time; deriving at least a second waveform for determining T LVE by using a method selected from the group consisting of pulse oximetry, Doppler velocimetry, measurement of arterial blood pressure, measurement of peripheral electrical bioimpedance, and measurement of peripheral electrical bioadmittance; and a) in a first action, independently using said first waveform and said at least a second waveform to determine values of T LVE by applying predetermined criteria to define an opening point and a closure point of the aortic valve in said first waveform and said at least a second waveform, and b) in a second action, averaging the values of T LVE by using predetermined weights for the T LVE values obtained from said first waveform and said at least a second waveform.