Our easy-to-read patient fact sheet compares and contrasts sinus arrhythmia vs AFib (atrial fibrillation) symptoms.

Sinus rhythm (a.k.a. normal sinus rhythm) refers to the normal heart beat originating from the sinoatrial node. This is manifested as an upright P wave in lead II of the ECG. Sinus bradycardia ...

The heart's normal sinus rhythm is created by electrical signals that spread throughout the heart in an organized manner ...

If there is a P wave before every QRS complex, and it has a sinus morphology, then normal sinus rhythm, or NSR, is said to be present. A sinus morphology is an upright P wave in lead II and ...

The heart tissue has a specialized conduction system that maintains ... rhythm may persist and take over the heart's normal sinus rhythm. It may cause symptoms like light-headedness and fainting ...