This book represents tangible results of the Institute of Applied Physiology and Medicine's objectives of bringing into clinical application the concepts and results of bioengineers and physiologists. lt has grown out of our experience in development of original Doppler diagnostic instrumentation and its application to more than 6,000 patients in non-invasive diagnosis of the extracranial cerebrovascular circulation. It gath- ers together bioengineering and physiological concepts which were initially developed for a graduate course for physicians and specialized medical tech- nicians. lt...