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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 ectopic rhythm is an irregular heart rhythm due to a premature heartbeat. Ectopic rhythm is also known as premature atrial contraction, premature ventricular contraction, and extrasystole. When your heart experiences an early beat, it is usually followed by a brief pause.f ectopic heartbeat is accompanied by chest pain and pressure, sustained rapid heart rate, or other symptoms, seek medical attention immediately. Diagnostic testing to determine the cause may include: 1  echocardiogram: sound waves are used to create a moving picture of the heart.