This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Disease of pericardium, Subject name: Medicine
[{'content': "Beck's triad of cardiac tamponade includes all, except? \nSelect and explain. \nA. Hypotension, B. Increased JVP, C. Muffled Hea sounds, D. Tachycardia", 'role': 'user'}, {'content': "Answer: D \nExplanation: Beck's triad: Hypotension Soft or absent hea sounds Jugular venous distention with a prominent x descent but an absent y descent. There are both limitation of ventricular filling and reduction of cardiac output. There may be reduction in amplitude of the QRS complexes, and electrical alternans of the P, QRS, or T waves should raise the suspicion of cardiac tamponade.", 'role': 'assistant'}]