DDx of Pulseless electrical activity (PEA)

’CHEAPMD’ (mnemonic) Cardiac Tamponade Hypoxia, Hypovolemia, Hypothermia, Hyperkalemia Embolism (massive pulmonary embolism) Acidosis Pneumothorax (tension pneumothorax) Myocardial Infarction Drug overdose, eg, tricyclic antidepressant, digoxin, beta blocker, calcium channel blocker