| 摘要 |
<p>A method and system for analyzing diastolic heart sounds detected rom a patient's chest cavity during the diastolic portion of the heart cycle in order to identify a low level auditory component associated with turbulent blood flow in partially occluded coronary arteries. The system includes an acoustic transducer (1) coupled against the chest cavity of a patient using an ultrasonic acoustic gel and a pulse sensor device and a signal processor (7) and a diagnostic display (14). Heart sounds detected by the acoustic transducer (1) are amplified by a conventional low noise audio amplifier (2), resulting in an electrical heart sound signal (3). Electro-optical pulse detector and associated amplifier (4) provide an output signal based on occurrence of the patient's pulse. The signal is processed through threshold detector (5) to provide a timing reference signal (6) indicative of the occurence of each pulse.</p> |
