Sinus Arrhythmia 

Sinus Arrhythmia


An irregular cardiac rhythm in which the heart rate usually increases during inspiration and decreases during expiration. It is common in children and young adults and has no clinical significance except in elderly
patients. Mosby (2009-02-11).


Characteristics

Rate Usually 60-100 BPM but may be faster or slower

Rhythm Irregular and phasic with breathing P-Waves Uniform in appearance; upright in lead 2. Proceeds each QRS

PR Interval 0.12 sec-0.20 sec (3-5 boxes) 

QRS Duration 0.11 sec (Almost 3 boxes) or less


Treatment


Normal Rate

Usually No


Slow or Brady Rate

Monitor Diagnostic 12 lead
Oxygen 15 LPM NR Mask
IV 18g
Atropine 0.5-1mg SIVP over 1-2 min (Repeat every 3-5 min. 3.0mg max)


MEDS

Atropine 0.5-1mg SIVP over 1-2 min (Repeat every 3-5 min. 3.0mg max)


Noticeable by: 

Looking at the strip, you can see that it is irregular. 

© Matt Dillard 2012