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Junctional

ECG Basics: Junctional Rhythm

Thu, 03/19/2015 - 12:40 -- Dawn

This is an example of a junctional rhythm that is slower than what is considered "intrinsic rate" for the junction.  The rate is around 30 bpm.  We know this is a "supraventricular" rhythm because of the narrow QRS.  Junctional beats travel to the ventricles via the bundle branches, which provides very fast conduction, resulting in a narrow QRS complex.  The P waves can be seen at the end of each QRS.  They are upside-down in this Lead II rhythm strip, indicating retrograde conduction from the junctional pacemaker to the atria.

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