question: Q:An otherwise healthy 57-year-old man presents to the emergency department because of progressive shortness of breath and exercise intolerance for the past 5 days. He denies recent travel or illicit habits. His temperature is 36.7°C (98.1°F), the blood pressure is 88/57 mm Hg, and the pulse is 102/min. The radial pulse becomes so weak with inspiration. Physical examination reveals bilateral 1+ pedal edema. There is jugular venous distention at 13 cm and muffled heart sounds. Transthoracic echocardiogram shows reciprocal respiratory ventricular inflow and ventricular diastolic collapse. Which of the following is the best next step in the management of this patient condition?? 
  {'A': 'Cardiac catheterization', 'B': 'Pericardiectomy', 'C': 'Pericardial drainage', 'D': 'Chest X-ray', 'E': 'Cardiac MRI'},