Acts as a relay station between the atria and the ventricles, delaying electrical impulses so as to allow the atria to completely empty and refill the ventricles with blood.
Inherent heart rate
AV junctional rate is 40 to 60 electrical impulses per minute
The electrical impulse that travels through the normal conduction pathway from the AV junction through the bundle of his and bundle branches, to the Purkinje fibers, ending in the ventricular muscle
Inverted P wave
Upside down due to retrograde depolarization
- Shortened PR interval of less than 0.12 seconds
Buried P wave
The force of the atrial depolarization is less than the force of the ventricular depolarization and therefore the P wave is hidden by the QRS complex
Retrograde P wave
Electrical impulse originates in the lower part of the AV junctional area, the distance the impulse must travel to the atria is greater than the distance to the ventricles.
- The atria depolarize slightly later than the ventricles
Dysrhythmia that occurs when all the electrical impulses originate from a single site within the AV junctional area, at a rate less than 40 impulses per minute.
- Caused by heart disease or medications
Accelerated junctional rhythm
Occurs when all the electrical impulses originate from a single site within the AV junctional area, at a rate between 61 and 100 impulses per minute.
Rate between 101-150 impulses per minute
Premature junctional complex
Individual complex that originates from a single site in the AV junctional area and occurs earlier than the next expected complex of the underling rhythm.
- Common and can occur in any rhythm
Wandering atrial pacemaker
Originates from at least three different sites above the bundle of his.
- SA node, any pacemaker site in the atria, the AV junction, or a combination of these area.
Atrioventricular junctional area
Portion of the hearts conduction system that works with the AV node to relay the release of electrical stimuli to the ventricles
- May function as a secondary pacemaker of the heart