Causes of pulseless electrical activity (mnemonic)

Pulseless electrical activity is a very disconcerting medical scenario with a very high mortality unless its aetiology can be quickly ascertained and corrected. A mnemonic to remember the different causes of pulseless electrical activity is:

  • MAD (triple H) Cat


  • H: hypoxia/hypothermia
  • H: hypovolaemia
  • H: hypokalaemia/hyperkalaemia

A useful way to remember the mnemonic is recalling Triple H is one of the biggest WWE stars and his "mad cat". 

Share Article

Article Information

rID: 7169
System: Cardiac
Section: Mnemonics
Synonyms or Alternate Spellings:
  • MAD (Triple H) CAT
  • Mad Triple H Cat

Support Radiopaedia and see fewer ads

  • Drag
    Tension pneumothorax
    Drag here to reorder.
  • Drag
    Massive bilateral...
    Massive pulmonary embolism
    Drag here to reorder.
  • Drag
    Cardiac tamponade
    Drag here to reorder.
  • Updating… Please wait.

    Alert accept

    Error Unable to process the form. Check for errors and try again.

    Alert accept Thank you for updating your details.