<prompt> All of the following can cause Pulseless electrical activity exceptPulseless VTTension pneumothoraxMassive pulmonary embolismCardiac tamponade  <response>: 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:hypoxiahypothermia H:hypovolaemia H:hypokalaemiahyperkalaemia C:cardiac tamponade A:acute myocardial infarction T:tension pneumothorax 