A wide QRS can mean the impulse is starting in the ... an accelerated idioventricular rhythm may persist and take over the heart's normal sinus rhythm. It may cause symptoms like light-headedness ...

Sinus rhythm (a.k.a. normal sinus rhythm ... Note that ectopic atrial rhythms can have a P wave before each QRS complex, however the P wave is not upright in lead II since it originates in ...

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 rhythm is regular ... occurs before each QRS complex (+) with a stable PR interval (0.14 sec). The P wave is positive in leads I, II, aVF, and V4-V6. This is a sinus tachycardia.