Echocardiograph, Cambridge, England, 1978
Echocardiography is a bedside technique for examining the heart. In this machine, high frequency ultrasound waves are produced by a transducer placed on the patient’s chest. The waves rebound or echo off the beating heart. These show the shape, size and movement of a heart's chambers and valves. They also show the rate of blood flow through the heart. Physicians examine these records for irregularities that may be a sign of disease. This echocardiograph was made by Cambridge Medical Instruments Limited in England.
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The study of diseases affecting the heart and blood vessels.
Glossary: echo cardiograph