10 free PANRE practice questions in the real exam format, covering the official content areas, with an explanation for every answer.
PANRE Practice Test 11Tutor mode
Question 1 of 10
Cardiovascular System
A 74-year-old woman is brought to the emergency department because of fatigue for 1 week and two episodes of near-fainting today. She takes no AV nodal blocking drugs. Temperature is 36.8°C (98.2°F), heart rate 38/min, respirations 16/min, blood pressure 108/64 mmHg, and oxygen saturation 96% on room air. She is alert and oriented. Intermittent cannon a waves are seen in the jugular venous pulse. A lead II rhythm strip is shown. The atrial rate is 84/min and regular, the ventricular rate is 38/min and regular, PR intervals vary randomly from beat to beat, and the QRS duration is 0.14 second. Which of the following is the most likely diagnosis?
Rhythm strip, lead II
Lead II: regular P waves at about 84/min and regular wide QRS complexes at about 38/min, with no fixed relationship between them. Figure not drawn to scale.