1. A system for testing a subject for the presence of ischemic heart disease comprising: a stressor for causing physiological stress in the subject; a thoracocardiograph (TCG) sensor sensitive to positions and/or motions of the anterior chest wall of the subject; an electrocardiograph (ECG) sensor; and an analysis computer for extracting cardiac parameters from TCG sensor signals by performing steps comprising receiving TCG and ECG signals, filtering the received TCG signals in order to enhance a cardiac component, ensemble averaging the filtered TCG signal triggered by occurrence of one or more fiducial points in the ECG signal, and extracting automatically the cardiac parameters.