A 60-year-old man is BIBA following an out-of-hospital cardiac arrest.

1. List (5) reversible causes of atraumatic cardiac arrest and (2) salient findings for each on POCUS which may be sought during the arrest or after ROSC is achieved. 10 marks

2. List (3) other potential benefits of POCUS in cardiac arrest. 3 marks

3. List (3) strategies to minimise interruptions to chest compression when performing POCUS during cardiac arrest. 1 mark

4. What is the difference between true PEA and pseudo-PEA? 2 marks