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Introduction Part 2 - Junctional Dysrhythmias.


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P Wave & QRS Complex

  • The coordination of the P wave and QRS complex is also affected by the increased conduction velocity of the electrical impulses in the ventricular myocardium.
  • The inverted P wave may be seen before or after the QRS complex, or it may be buried within it.
  • Refer to the image on the next slide to reinforce this concept.

Illustration

junctional ecg image 2

Intro to PJC

  • PJC's can occur for a number of different reasons i.e., diet, fatigue, stress, disease, ischemia to name a few.
  • Premature complexes frequently occur in bradycardic rhythms, but may occur almost any time.
  • PJC's occur when an early electrical impulse occurs from a location in the atria other than the SA node.

Types

We will be discussing the following complexes and rhythms:

  • Premature Junctional Complexes and Junctional
  • Escape Beats
  • Junctional Rhythm
  • Accelerated Junctional Rhythm
  • Junctional Tachycardia
  • Although not specifically a Junctional rhythm, we include supraventricular tachycardia because it may originate above the ventricles (including the junction).



Authors and Reviewers

Authored by Thomas O'Brien
Medically reviewed by Dr. Jonathan Keroes, MD, Cardiology
Last Update: 11/8/2020



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