| 摘要 |
The system (10) includes a main (12) and a background gamma radiation detector (14) provided in a vestlike garment (16) worn by a patient during a prescribed period of time. Also included is an apparatus and method for determining the exact location of the left ventricle of the heart and positioning and maintaining the main radiation detector (12) relative to the left ventricle, during an ambulatory study period. Information from detectors (10) and (12), as well as ECG electrodes is electronically processed and recorded on a portable cassette recorder, and may thereafter be presented to the memory of a stand alone computer (92), which calculates and displays R-R time intervals, electrocardiogram and time-activity curves, and other physiological data. From the computer calculations the average heart rate, number of aberrant beats, left ventricular ejection fraction, relative cardiac blood volume and other physiological values may be determined. |
