WORKPLACE NURSES LLC
Cardiac Rhythm Intrepretation
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Normal Sinus Rhythm

NORMAL SINUS RHYTHM
Sinus Rhythm
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ELECTROCARDIOGRAM

Definition - A graphic recording of the electrical activity produced by the muscles of the heart.

Normal electrical conduction - impulse is generated in the SinoAtrial node (SA) conducted through the atria to to Atrioventricular junction (AV node) and then along the Bundle of His through the ventricles.

HEART RATES:

NSR - 60-100      

Sinus Bradycardia <60    

Sinus Tachycardia >100

Analysis of Sinus Rhythm:

Normal "P" wave present, PR interval 0.12 - 0.20 sec (< 1 lagre box), QRS complex 0.06 - 0.10 sec, regularly spaced rate 60 to 100 beats/minute.

Sinus Arrythmia occurs when normal waves are present with an irregular or variable rate.

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