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Your heart is back in your body, but some advanced technologies remain: You are more resistant to poison (50%) and robots are only somewhat confused by you (25% less likely to score a critical hit) now. But on the bright side, healing items (chems) are even more effective!Fallout: New Vegas description

Cardiac Arrest is a special perk in the Fallout: New Vegas add-on Old World Blues.


The Courier must convince their brain to return to their body or convince it to come back to The Sink. After, one can have their heart reinserted into their body. This perk replaces Heartless.


+50% to poison resistance, -25% chance to get critical hits from robots, and bonus healing with certain items. Stimpaks gain 15 bonus healing on use, and the following aid items heal an additional seven hit points on use. This healing is not displayed on the items themselves.



  • Compared to the Heartless perk, it gives slightly more healing at the cost of +25% critical chance from robots and +50% poison resistance rather than immunity.
  • Grants the full 85% resistance to poison when combined with 8 Endurance, the maximum achievable in derived statistics. Of course, this is still outclassed by Heartless's poison immunity.
  • Cardiac Arrest shares the same Vault boy image as Heartless.

Behind the scenes

The real-life term "cardiac arrest" refers to a sudden loss of blood flow resulting from the failure of the heart to pump effectively. While a cardiac arrest may be caused by myocardial infarction (heart attack) or congestive heart failure, these are not the same.


  • PCPC Playstation 3Playstation 3 Xbox 360Xbox 360 This perk grants -50% critical chance from enemy robots, rather than the listed -25%. [verified]
  • PCPC The Sink Auto-Doc message for this perk erroneously states "healing items (chems) are twice as effective (+50%)". [verification needed]

See also