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 ...

Sinus rhythm resumes with increased heart rates during exercise ... The standards for QRS voltage have been derived from studies of populations of clinically normal children. Furthermore, the limited ...

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 ...

In rare cases, an accelerated idioventricular rhythm may persist and take over the heart's normal sinus rhythm. It may cause symptoms like light-headedness and fainting, or increase risk of heart ...