Noninvasive measurement of the intracardiac blood flow by means of ultrasound techniques.
A new noninvasive method of measurement of the intracardiac blood flow by means of ultrasound techniques is described. In this system the "M-sequence modulated Doppler method" and the method of ultrasonotomography are used in combination. An arbitrary space within the heart can be selected by ultrasonocardiotomography and the blood flow profiles can be observed by the "M-sequence modulated Doppler method." The new Doppler flow meter system described in this paper can be applied not only for the diagnosis of heart diseases, but also for the study of pathophysiology of the blood flow and of the factors responsible for the dilatation of the heart. Further studies are required from the viewpoints of medicine and engineering to accumulate sufficient data before routine application of the method described in this paper is fully warranted.
D003326:Coronary Circulation; D004301:Doppler Effect; D004452:Echocardiography / Q000295:instrumentation / Q000379:methods; D006801:Humans; D012212:Rheology