This EKG is of a 91-year-old man who was in the hospital with a hip fracture. He complained of palpitation while resting in his bed. His cardiac examination was otherwise unremarkable.  

Questions:

1-What is the rhythm?

  1. Atrial fibrillation
  2. Atrial bigeminy
  3. Atrial tachycardia (AT)
  4. Blocked premature atrial contractions (PACs)

2-What is the rough average ventricular rate based on this EKG?

  1. 45 bpm
  2. 100 bpm
  3. 125 bpm
  4. 188 bpm