63 yo M is evaluated in the ED for progressive dyspnea. Pt reports increasing difficulty while lying flat. He has history of Afib and underwent catheter ablation 1 week ago.Which of the following is the most likely cause of the patient's dyspnea?
a) Acute pulmonary embolism
b) Cardiac tamponade
c) Pneumothorax
d) Pulmonary hypertension
