This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
[{'content': 'What is the treatment for Cardiac tamponade - \nSelect and explain. \nA. Immediate anticoagulation, B. Emergency subxiphoid percutaneous drainage, C. Transesophageal pericardiocentesis, D. Stabilize and observe', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Answer- B. Emergency subxiphoid percutaneous drainageEmergency subxiphoid percutaneous drainage -This is a life-saving bedside procedure. The subxiphoid approach is erapleural; hence, it is the safest for blind pericardiocentesis. A 16- or l8-gauge needle is inseed at an angle of 3O-45 degree to the skin, near the left xiphocostal angle, aiming towards the left shoulder. When performed emergently, this procedure is associated with a repoed moality rate of approximately 4% and a complication rate of l7%.', 'role': 'assistant'}]