No Heart is a fan-proposed variation of No Vitals.

IT: No Vitals is a sort of defense, it seems reasonable to borrow the Partial limitation from DR (as in Bio-Tech). There, Groin only is listed as -60%. I'm not sure how that was calculated, but the Groin is normally at -3, and the heart is at -5 to hit, so that Partial is -20% higher, for a "No Heart" of -80% or [1] (a perk) and a "No Vitals But the Heart" of -20% or [4] (which means it's the equivalent of a quirk for characters with No Vitals, as someone else suggested).
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