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 along a certain route at a particular speed. This article explores sinus ...

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 ...

QS;,.eighteen normal full-term (39-41 weeks of gestation) neonates, were studied at 3±1 days. Eye polygraphy and heart rate recordings were performed between 8am and 1pm. Alertness stage was ...