HPI: A 54-year-old man presents to the emergency department reporting that his heart feels like it is skipping beats. He is noted to be bradycardic on arrival. The following ECG is obtained:
Before watching the video, look closely at this ECG and ask yourself:
- What is the heart rate and rhythm?
- What is the most likely cause of the changing morphology of QRS complexes?
- What is the most likely diagnosis?