Junctional rhythms originate from which area of the heart?
Understand the Problem
The question is asking about the origin of junctional rhythms in the heart, specifically which area they originate from. Junctional rhythms typically arise when the normal pacemaker (the sinoatrial node) fails, and the atrioventricular (AV) junction takes over as the pacemaker.
Answer
AV node or His bundle
Junctional rhythms originate from the AV node or His bundle.
Answer for screen readers
Junctional rhythms originate from the AV node or His bundle.
More Information
Junctional rhythms are heart rhythms resulting from impulses that originate from the atrioventricular (AV) node or the bundle of His when the sinoatrial (SA) node isn't functioning properly.
Tips
Common mistakes include confusing junctional rhythms with atrial rhythms. Ensure you identify the correct origin of the impulses using ECG analysis.
Sources
- Junctional Rhythm - PubMed - pubmed.ncbi.nlm.nih.gov
- Junctional Rhythm: Background, Pathophysiology, Etiology - emedicine.medscape.com
- Junctional Rhythms ECG Review | Learn the Heart - Healio - healio.com
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