| 摘要 |
The invention relates to an apparatus and a method for deter-mining an approximate value for the stroke volume and the cardiac output of a person's heart. The apparatus and method employ a measured electrical impedance, or admittance, of a part of a person's body, namely, the thorax. This part of a person's body is chosen because its electrical impedance, or admittance, changes with time as a consequence of the peri-odic beating of the heart. Accordingly, the measured electri-cal admittance or impedance can provide information about the performance of the heart as a pump.
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