ECG Analysis: Rhythm Recognition (Relias) Exam Questions and Answers

What is the normal PR interval for an atrial fibrillation rhythm? - Answer- Not applicable Which of the following measures the time from the start of atrial depolarization to the start of ventricular depolarization? - Answer- PR Interval Which of the following is associated with sinus tachycardia? - Answer- anxiety, fear, pain What is the normal duration for the PR interval? - Answer- 0.12-0.20 What is characteristic of standard ECG paper? - Answer- Comprised of small boxes measuring 0.04 seconds Which rhythm occurs when the atrial rate and ventricular rate occur independently? - Answer- Third Degree Block What is a characteristic of sinus bradycardia? - Answer- less than 60 bpm What part of the heart is the origin of an idioventricular rhythm? - Answer- Ventricles What ECG rhythm has no discernible P waves, irregular fibrillatory waves, and an irregular R to R interval? - Answer- Atrial fibrillation What helps determine if a patient is Â"toleratingÂ" a rhythm? - Answer- Blood pressure and level of consciousness What part of the heart ejects blood into the aorta? - Answer- Left Ventricle When placing a 5 lead ECG on a patient, which lead would be placed on the right 4th intercostal space? - Answer- V True or False: Multifocal Atrial Tachycardia is caused by at least three ectopic atrial pacemakers and has a rate of greater than 100 beats per minute. - Answer- True What is a potential cause of PVCs? - Answer- Hypokalemia What type of AV block is associated with progressively longer PR intervals and an eventual Â"droppedÂ" QRS complex? - Answer- Second Degree Type-1 How long is a normal QRS complex? - Answer- less than 0.12 seconds What is an expected atrial rate in atrial flutter? - Answer- 250-400 bpm Which rhythm has a "sawtooth" patterned waves? - Answer- Atrial flutter What part of the cardiac cycle correlates with the QRS complex? - Answer- Ventricular depolarization Which ECG finding is present in an idioventricular rhyth