EKG Exam Practice Questions and Answers

Where does a junctional rhythm originate AV Node Why do we call it AV Junction and not AV Node? AV junction is the space between the atrial and ventricle, while the AV node is the back up pacemaker Where will the P waves be located with a junctional rhythm? Immediately before, after, or hidden within QRS What is the rate of a junctional rhythm 40 to 60 bpm What is an accelerated junctional rhythm? Rate: 60-100 bpm Rhythm: regular P-waves: inverted or missing for each beat PRI: varies QRS: =>.12 What is junctional tachycardia? Regular: rhythm Rate: > 100 bpm P waves: inverted in lead 2 immediately before, after, or hidden in QRS QRS: normal PRI: <= 0.10 sec What are the different rates of junctional rhythm, accelerated junctional rhythm, and junctional tachycardia 40-60 bpm 60-100 bpm over 100 bpm What steps do you follow for a 12-lead interpretation? What is a 1st Degree AV Block? Rhythm: regular Rate: that of underlying sinus rhythm, atria and ventricular rates are same P-waves (lead II) sinus origin, one P wave to each QRS complex PRI: prolonged (>0.20 sec); constant QRS: normal (<= 0.10 sec) 1st Degree AV Block - Where is the delay? This delay is resulting in what on the EKG tracing? During the PR interval Constant PRI > 0.20 seconds one P wave to each QRS