Measurements of cardiac efficiency and internal work of the left ventricle via reconstructed impedance cardiography.

. The aim of this study was to investigate methods for measuring the cardiac efficiency (CE) and internal work (IW) of the left ventricle via reconstructed impedance cardiography (RICG).On the basis of the physiological context and Bernoulli's equation in physics, methods of measuring the CE and IW were proposed.

Waveform analysis of differential graphs of reconstructed impedance cardiography from healthy individuals.

Purpose: The aim is to measure and analyze the wave amplitudes and time intervals of differential graphs of reconstructed impedance cardiography (RICG).

Methods: 180 adults with normal cardiac function between the ages of 18-78 were included in the study. Six mingled impedance changes on chest surface were simultaneously detected for each subject.

Comparing square root method of measuring the cardiac output by means of aortic impedance change component to Kubicek's method.

Purpose: The aim of this study is to explore a calculated method used to measure the cardiac output using the aortic impedance change component of reconstructed impedance cardiography.

Methods: Routine impedance cardiography was measured using Kubicek's method with four ring electrodes. The thoracic mixed impedance changes were measured by six leads, which consisted of 15 electrodes.