You're in resus leading a cardiac arrest. Lying on the trolley is Dave, a 45 year old male, known hypertensive and type 2 diabetic. He collapsed whilst putting a big bet on in the bookies, having just complained of some chest pain, looked flushed and sweaty and fell to the deck. He had immediate bystander CPR, the ambulance arrived within a couple of minutes, confirmed cardiac arrest with a rhythm of VT.......