· AJR is a narrow complex tachycardia caused by increased automaticity in the AV node and decreased automaticity in the sinus node. Learn how to diagnose, differentiate and treat AJR from other junctional rhythms with ECG examples and references. Learn about the causes, features and ECG patterns of accelerated junctional rhythm, a secondary pacemaker in the heart.
Understanding the Context
See examples of accelerated junctional rhythm with digoxin intoxication, myocardial infarction and 3rd degree AV block. · Junctional escape beats originate in the AV junction and are late in timing. They often occur during sinus arrest or after premature atrial complexes. The QRS complex will be measured at 0.10 sec or less.
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Key Insights
Rhythm will be regular with a rate of 40-60 bpm. This abnormal rhythm originates in the bundle of His. Accelerated junctionalrhythm (AJR) occurs when the AV node, or the surrounding junctional tissue, generates electrical impulses at a rate faster than its usual escape rhythm but not as fast as a true tachycardia originating from this area. If the AV junction speeds up and fires at 61 to 100 beats/min, the resulting rhythm is called an accelerated junctional rhythm. This rhythm is caused by altered automaticity of the bundle of His.
Important Details
Detailed illustration of a human heart, focusing on the AV junction and electrical pathways involved in accelerated junctionalrhythm, set against a neutral clinical backdrop. Explore accelerated junctionalrhythm, its symptoms, causes, and treatment options for effective management of this cardiac condition. Learn about the causes, characteristics, and treatment of accelerated junctional rhythm, an abnormal heart rhythm originating from the AV junction. See ECG examples, jingles, and quizzes to test your knowledge.
