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The National Comprehensive Cancer Network (NCCN) is a not-for-profit alliance of 23 of the world’s leading cancer centers. We are dedicated to improving the quality and effectiveness of care provided to people with cancer.

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Term Definition
Echocardiography

A procedure that uses ultrasonic waves directed over the chest wall to obtain a graphic record of the heart's position, motion of the walls, or internal parts such as the valves.
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