This video will help describe the basic components of normal sinus rhythm (NSR). Understanding how to identify a NSR will help you identify what about a rhythm might be abnormal on a given rhythm strip This video is specifically provided by EMTprep to assist students in preparing for the NREMT exam and related skills sheets and for no other purpose. NREMT study aids and resources provided by EMTprep are not intended to provide training for life-saving techniques, emergency response training, or any other type of medical training.