Normal Sinus Rhythm (NSR) 

Normal Sinus Rhythm


The normal heartbeat initiated by the pacemaker in the sinus node, with a heart rate of 60 to 100 beats/ min. Mosby (2009-02-11).


Characteristics

Rate 60-100


Rhythm Regular


P-Waves Uniform in appearance; upright in lead 2. Proceeds each QRS.


PR Interval 0.12 sec-0.20 sec (3-5 boxes) and constant from beat to beat


QRS Duration 0.11 sec (Almost 3 boxes) or less


Treatment

 


MEDS

 

© Matt Dillard 2012