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.
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.