Atrial Rhythms Quiz

1. An ECG characteristic described as a sawtooth appearance is seen in which one of the following cardiac arrhythmias?

2. An ECG tracing that shows an abnormally long R-R interval followed by a QRS complex with an rSr’ configuration without any compensatory pause is brought about by which aberration in atrial fibrillation?

3. Refer to the ECG tracing below from a 61-year-old woman with no subjective complaints. Which one of the following cardiac arrhythmias produces this ECG finding?

4. Which of the following findings are distinct for arrhythmias that are atrial in origin? 

5. Which of the following rhythms is caused by an irritable focus within the atria that has overcome the sinoatrial node. The rate is 150–250 bpm, and the rhythm is regular, with a P wave morphology that varies and may sometimes be buried within the T wave, a PR interval of 0.12 seconds, and a QRS complex < 0.12 seconds?

6. Which one of the following arrhythmias is produced by an intensely irritable focus causing a rate > 250 bpm with a saw-tooth appearance due to the cyclic pattern of impulse generation creating a series of atrial waves?

7. Which one of the following atrial arrhythmias is intensely irritable to the point where the atria are merely quivering and no longer beating?

8. Which one of the following interventions is not used to treat atrial fibrillation?