Bradyarrhythmias: rash, a history of tick bite, and slow regular rhythms

ECG Weekly Workout with Dr. Amal Mattu


A 61-year-old man presents to the emergency department with generalized weakness and dyspnea. He reports a recent tick bite and associated circular rash with target-like appearance to the arm. He is noted to be bradycardic, and the following ECG is obtained:

Before watching the video, look closely at this ECG and ask yourself:

  1. What is the rhythm?
  2. What is the most likely diagnosis?