A 55-year-old woman has presented with chest pain and shortness of breath. Bedside cardiac ultrasound has revealed a large pericardial effusion.

1. List (4) potential causes for her pericardial effusion. For each, provide a discriminatory feature from history or examination. 4 marks

2. State (3) ultrasonographic signs suggestive of cardiac tamponade 3 marks

Shortly after arrival, the patient deteriorates with a loss of consciousness and no palpable pulse. The cardiac monitor reveals sinus rhythm at a rate of 110bpm.

3. Briefly outline (5) components of your management. 5 marks