Ventricular fibrillation is often a fatal arrhythmia. It occurs when the ventricular rate exceeds 400. In this setting, virtually no forward cardiac output occurs. Advanced Cardiac Life Support ...

This means an ECG showing atrial fibrillation will have no visible P waves and an irregularly irregular QRS complex. The ventricular rate is frequently fast, unless the patient is on AV nodal ...

ECG plays an important role in detection of several stroke risk factors/predictors including atrial fibrillation ... ventricular complexes 6% among people aged 45–65 years on a 2-min rhythm ...