Introduction Part 1 - Junctional Dysrhythmias.
- Cardiac rhythms are typically named by the site of origin or heart structure where the problem is occurring
- These junctional dysrhythmias primarily affect the P wave.
- Electrical impulses formation and flow in a normal heart follow a forward or antegrade flow through the atria. This results in the upright P wave we see with Sinus rhythms.
- With junctional rhythms, the impulse is initiated in the AV junction. This impulse point results in a backward or retrograde flow of electricity during atrial depolarization.
- This change in the flow of electricity results in an inverted P wave. This morphologic feature is unique to Junctional complexes and rhythms.
Inverted P Wave
- The result of this retrograde depolarization is the classic inverted P wave.
- Because the electrical impulse causing atrial depolarization may come from anywhere in the AV junction. This can affect the location or coordination with the QRS complex.