normal sinus rhythm

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Related to normal sinus rhythm: Sinus tachycardia

normal sinus rhythm (NSR)

Etymology: L, norma, rule, sinus, hollow; Gk, rhythmos
the normal heartbeat initiated by the pacemaker in the sinus node, with a heart rate of 60 to 100 beats/min.

nor·mal si·nus rhythm

(nōŕmăl sīnŭs ridhŭm)
Beating of the heart that falls within the range of what is considered to indicate good health.

normal sinus rhythm

The normal heart rhythm whose pacemaker is in the sinoatrial node and whose conduction through the atria, atrioventricular node, and ventricles is unimpaired. The interval between complexes is regular, the ventricular rate is 60 to 100, there are upright P waves in leads I and II, a negative P wave in lead AVR, a P-R interval of 0.12 to 0.20 sec, and one P wave preceding each QRS complex. Synonym: sinus rhthym
See also: rhythm
References in periodicals archive ?
Within 2-3 hr after the exposure stopped, the arrhythmia resolved and she returned to normal sinus rhythm.
The significant advantage in time to conversion to normal sinus rhythm with vernakalant compared to propafenone or flecainide, that leads to a reduction in hospital stay-length may result in patient benefits," Dr.
Whether our patient would have reverted to normal sinus rhythm if he had received the intended dose of 50 [micro]g of remifentanil is debatable.
After initiating telemetry, 80% of the patients had a normal sinus rhythm, and the remaining 20% had atrial fibrillation or flutter, a paced rhythm, junctional rhythms, second-degree heart block, or tachycardic runs.
The electrocardiogram showed normal sinus rhythm (94 beats/mm), QRS axis of 60 degrees, and PR interval of 0.
According to this study, ablation treatment, which restores and maintains normal sinus rhythm, was associated with improved quality of life.
Procoralan is already indicated in the symptomatic treatment of chronic stable angina pectoris in coronary artery disease adults with normal sinus rhythm unable to tolerate or with a contra-indication to the use of beta-blockers or in combination with beta-blockers in patients inadequately controlled with an optimal beta-blocker dose and whose heart rate is > 60 bpm.
His heart rate began to nor malize, and he spontaneously returned to normal sinus rhythm.
An EKG was performed which revealed normal sinus rhythm with a rate of 95, QRS axis of +80, and an incomplete right bundle branch block (thought to be a normal variant).
and Teijin Pharma Limited for the development and commercialization of NTC-801, a selective inhibitor of the acetylcholine-activated potassium ion channel (IKACh), currently in Phase I development in Japan, for the maintenance of normal sinus rhythm in patients with atrial fibrillation.