P Wave Asystole

Another form of Asystole you may encounter is called P wave asystole or Ventricular Asystole. The features are the same as traditional Asystole, but with one exception, there will be P waves present in the ECG tracing. The patient is clinically dead. The patient will not survive with just atrial depolarization and will require CPR.

Asystole

Asystole, also known as flatline, is a condition in which there is no electrical activity from the heart and thus no blood flow. 

It leads to cardiac arrest. 

Survival rates in a cardiac arrest patient with asystole are much lower than in a patient with a defibrillable rhythm; asystole is not a "shockable" rhythm in and of itself.

ECG example of asystole

ECG rhythm strip example of asystole