Junctional rhythm

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The 5th beat on the rhythm strip above shows a PJC complex Premature junctional contractions (PJCs), also called atrioventricular junctional premature complexes or junctional extrasystole, are premature cardiac electrical impulses originating from the atrioventricular node of the heart or "junction." This area is not the normal but only a secondary source of cardiac electrical impulse formation. These premature beats can be found occasionally in healthy people and more commonly in some…

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Bradycardia 60 normal sinus rhythm Sinus Tachycardia 100 (100-150) normal sinus rhythm Premature Atrial Contraction (PAC) Heart Rate: Depends on underlying rhythm Regularity: Interrupts the regularity of underlying rhythm P-Wave: can be flattened, notched, or unusual. May be hidden within the T wave PRI: measures between .12-.20 seconds and can be prolonged; can be different from other complexes QRS: .12 seconds Sinus Arrest/Pause – SA node doesn’t fire – notice absence of P-wave for a…

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ecg, ecg interpretation, junctional rhythm

Junctional rhythm (JR) is a type of irregular heartbeat. A normal heartbeat relies on electrical activation by signals originating from the sinoatrial (SA) node, located in the heart's upper-right-hand chamber (right atrium). However, in junctional rhythm, the electrical signals originate from the atrioventricular (AV) node or the His bundle, instead. This phenomenon typically results in a slower rhythm or heartbeat.

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characterized by premature heartbeats originating in the atria. While the sinoatrial node typically regulates the heartbeat during normal sinus rhythm, PACs occur when another region of the atria depolarizes before the sinoatrial node and thus triggers a premature heartbeat.

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