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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.
Stress Echo is made up of three parts: A resting Echo study, Stress test, and a repeat Echo while the heart is still beating fast. Exercise stress testing usually employs the Bruce or a similar protocol, as described in the Regular Stress Test section.