Figure 2-19. Atrial fibrillation (slow).
Figure 2-20. Atrial fibrillation (rapid).
a. General Information. Junctional arrhythmias create an inverted P wave
because the atria are depolarized by the retrograde conduction. These abnormal
conditions will depolarize the ventricles in the normal manner (normal QRS). An
inverted P wave can occur before, during, or after the QRS complex. All junctional
rhythms will create an inverted P wave, but some low atrial impulses can also cause
inverted P waves.