A 60 year old pt who has had a MI a week back presents with dyspnea and pericardial rub. ECG shows ST elevation. CXR: loss of margin at costo-vertebral angle. What is the single most likely cause?

The key is C. Dressler’s syndrome. [Usually Dressler’s syndrome tends to occur 2 – 3 weeks after MI.

In Dressler’s syndrome there occurs pericarditis (pericardial rub is common) with widespread ST

elevation. Dressler’s syndrome, is characterized by combinations of pericarditis, pleuritis, and

pneumonitis. This pleuritis is responsible for pleural effusion leading to loss of margin at costo-vertebral

angle].