A junctional escape beat is a delayed heartbeat originating not from the atrium but from an ectopic focus somewhere in the atrioventricular junction.[1] It occurs when the rate of depolarization of the sinoatrial node falls below the rate of the atrioventricular node.[2] This dysrhythmia also may occur when the electrical impulses from the SA node fail to reach the AV node because of SA or AV block. It is a protective mechanism for the heart, to compensate for the SA node no longer handling the pacemaking activity, and is one of a series of backup sites that can take over pacemaker function when the SA node fails to do so. It can also occur following a premature ventricular contraction or blocked premature atrial contraction.[3]
^Abedin, Zainul; Conner, Robert (2012). Interpretation of Cardiac Arrhythmias: Self-Assessment Approach. Springer Science & Business Media. p. 234. ISBN 9781461546078. Retrieved 11 November 2017.
^Catalano, Joseph T. (2002). Guide to ECG Analysis. Lippincott Williams & Wilkins. p. 140. ISBN 9780781729307. Retrieved 11 November 2017.
^ECG Challenge: What's Behind Her Slow Pulse?
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A junctionalescapebeat is a delayed heartbeat originating not from the atrium but from an ectopic focus somewhere in the atrioventricular junction. It...
junctionalescapebeat. If the rate from both the SA and AV node fall below the discharge rate of ventricular pacemaker cells, a ventricular escape beat...
the QRS complex. An AV-junctionalescapebeat is a delayed heartbeat originating from an ectopic focus somewhere in the AV junction. It occurs when the rate...
of the P-R interval. The pause ends with a P wave, instead of a junctionalescapebeat the way a sinus arrest would. Emergency treatment consists of administration...
Lippincott Williams & Wilkins. 2007. pp. 116–18. ISBN 978-1-58255-701-4. "Junctionalescape rhythm". ECG Interpretation: An Incredibly Easy! Pocket Guide (4th ed...
heartbeat, in contrast to escapebeats, in which the normal sinoatrial node fails, leaving a non-nodal pacemaker to initiate a late beat. The exact cause of...
following order: Atrial escape (rate 60–80): originates within atria, not sinus node (normal P morphology is lost). Junctionalescape (rate 40–60): originates...
dysfunction can also present with sudden sinus arrest with or without junctionalescape, sinoatrial block, prolonged asystolic period followed by tachycardias...
(2006). Biology : concepts & connections (5th ed.). San Francisco: Pearson/Benjamin Cummings. pp. 473. ISBN 0-13-193480-5. Junctional Rhythm at eMedicine...
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medical device that provides correct electrical impulses to trigger heart beats, compensating for the natural pacemaker's unreliability. Therefore, heart...
(ventricular escape) and those faster than 120 (ventricular tachycardia). Though some other references limit to between 60 and 100 beats per minute. It...
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