Why is there no P wave in atrial fibrillation?

Diagnosis – Atrial Flutter Sinus P waves are absent . The classic “sawtooth” pattern occurs, as the reentrant circuit around the tricuspid valve is large, resulting in high-amplitude P waves.10 Nis 2017

Diagnosis – Atrial Flutter Sinus P waves are absent . The classic “sawtooth” pattern occurs, as the reentrant circuit around the tricuspid valve is large, resulting in high-amplitude P waves.10 Nis 2017

Because the atrial rate is so fast, and the action potentials produced are of such low amplitude , P waves will not be seen on the ECG in patients with atrial fibrillation.