| 摘要 |
Vector cardiogram signals are processed by an analog computer circuit during a QRS wave interval in which a sheet of depolarization traverses a heart muscle to provide signals which enable a determination of the relative volume of heart muscle tissue that is functioning during the QRS wave interval. By comparing such relative volumes determined from signals processed from vectorcardiograms produced both before and after an "intervention" affecting the heart muscle, such as either a myocardial infarction or a therapeutic intervention following a myocardial infarction, it is possible to make a quantitative determination of the percentage of heart muscle tissue affected by the intervention.
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