Cardiac Arrest!

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

Obtaining
This perk will replace Heartless if you opt to have the Sink Auto-Doc re-insert your heart when the option becomes available.

Effects
You gain a 50% resistance to poison, the effects of healing items are boosted by 50%, and robots have a -25% chance of scoring a critical hit on you.