This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiopulmonary Cerebral Resuscitation, Subject name: Anaesthesia
All of the following can cause Pulseless electrical activity except 
Select and explain. 
A. Pulseless VT, B. Tension pneumothorax, C. Massive pulmonary embolism, D. Cardiac tamponade
A: Pulseless VT
Answer: A: Pulseless VT 
Explanation: Pulseless electrical activityis a very disconceing medical scenario with a very high moality unless its aetiology can be quickly asceained and corrected. Treatment involve staing CPR immediately and administering 1 mg epinephrine IV mnemonic to remember the differentcauses of pulseless electrical activityis: MAD (triple H) CAT Mnemonic M:massivepulmonary embolism A:acidosis D:drug overdose H:hypoxia/hypothermia H:hypovolaemia H:hypokalaemia/hyperkalaemia C:cardiac tamponade A:acute myocardial infarction T:tension pneumothorax