Pathophysiology
         
Normal Sinus Rhythm      

A basic rhythm with normal PQRST intervals/durations. Regular R-R intervals at a rate of 60-100 bpm (subject 6 years of age or older). Each QRS complex is preceded by a normal P-wave. PR interval is normal and remains constant. QRS duration is < 100ms wide.

Rhythm Strip
Normal Sinus Rhythm_Rhythm Strip

Normal Sinus Rhythm (77 BPM)

12 Lead EKG
Normal Sinus Rhythm 12 Lead EKG