This video examines the characteristics of idioventricular rhythms. An idioventricular rhythm occurs when the ventricles become the pacemaker of the heart, and may result in a hemodynamically unstable patient. Check out our website, EMTprep.com for more great free training material. 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.