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reciprocal beat a heartbeat resulting from an atrial or ventricular complex caused by a return of an impulse to its chamber of origin; called also echo beat. sinus beat a heartbeat with sinus rhythm. ventricular beat an ectopic beat originating in a ventricle.
An echocardiogram (also called an echo), is a non-invasive test to look at the structure and motion of heart function, heart valves, and blood flow through the heart. This test uses ultrasound (high-frequency sound waves) to create an image of your heart on a television screen (monitor).