The Vault - Fallout Wiki

We've Moved! Just as Gamepedia has joined forces with Fandom, this wiki had joined forces with our Fandom equivalent. The wiki has been archived and we ask that readers and editors move to the now combined wiki on Fandom. Click to go to the new wiki.


The Vault - Fallout Wiki
Cardiac Arrest
Old World Blues
RequirementsComplete Old World Blues
Convince your brain
Re-insert heart
Effects50% poison resistance
+50% bonus to healing items
Robots have -50% critical chance against you
base idxx015bbb
xx015bb2Cut contentIcon cut.png (Heart-full)
xx01604aCut contentIcon cut.png (Cardiac Arrest mirror)
Gametitle-FNV OWB.png
Gametitle-FNV OWB.png

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.


Convince your brain to return to your body or convince it to come back to The Sink. After, you can have your heart reinserted into your body.


You gain +50% poison resistance, +50% bonus to healing items and robots have -50% critical chance against you. Compared to the Heartless perk, you gain an additional +25% bonus to healing items at the cost of 50% poison resistance rather than immunity. Grants the full 85% resistance to poison when combined with 8 Endurance, the maximum you can achieve in derived statistics.


  • PCIcon pc.png PlayStation 3Icon ps3.png Xbox 360Icon xbox360.png This perk grants -50% critical chance from enemy robots, rather than the listed -25%. For PC users, a fix for this perk along with Brainless and Big Brained is available here.

Behind the scenes

Icon cut content.pngThe following is based on Fallout New Vegas cut content and has not been confirmed by canon sources.

Apparently, the original counterpart to Heartless was to be called 'Heart-full', and the description implies it would have provided +5 Barter, +5 Speech, and an additional 10% chance to hit enemy torsos in VATS. Additionally, there is also a mirror of Cardiac Arrest with a different description and the effects from Heartless.

Your body once again pumps with blood and passion. Your Barter and Speech skills have increased by 5. And your ability to shoot an enemy's heart has increased (+10% VATS to the torso).

— Heart-full description

Your heart has been augmented with advanced technologies: You cannot be poisoned, and filters in your heart will also regulate bleeding and healing, allowing all healing items (chems) to function at a higher level (+25%). Robots are now confused by you and 50% less likely to score a critical hit.

— Cardiac Arrest mirror description
Icon cut content.pngEnd of information based on Fallout New Vegas cut content.

See also