7.8.11 Junctional escape rhythm
A junctional escape rhythm occurs when the junctional escape beats become regular and persistent because of the lack of SA stimulus or AV block. The rhythm is regular and usually slow. No A sound will be heard if SA arrest is present. The ECG shows a slow heart rate with regular R-R intervals and a normal or nearly normal QRS complexes. Retrograde P waves may be seen. This is a protective mechanism that does not require treatment.