两个医生正注视着显示病人心脏跳动的录像磁带。他们不能确诊这个病人为什么呼吸困难,而录相显示出一股黑色的液流从主动脉瓣喷流出来,清楚地指出在瓣膜上有一个漏洞。以磁共振成像原理而成的心脏跳动的录像,是近几年来医学新技术发明之一。此外,还有用于诊断眼部肿瘤的超声系统;基于体温变化来调节速率的心脏 The two doctors are watching video tapes showing the patient’s heart beating. They could not confirm why the patient had difficulty breathing, and the video showed a black stream of fluid escaping from the aortic valve, clearly indicating a hole in the valve. The heartbeat recording made by the principle of magnetic resonance imaging is one of the new medical technology inventions in recent years. In addition, there is an ultrasound system for diagnosing eye tumors; a heart that regulates the rate based on changes in body temperature