Editing Heart

{{infobox main|
| name = Heart
| image = Health item natural.png|Heart
| type = Medical Items
| type2 = Body Parts
| description = A biological human heart. Pumps blood around the body.
| mass base = 1
| hp = 50
| flammability = 1.0
| marketvalue  = 1200
| thingCategories = BodyPartsNatural
}}
The '''heart''' is an organ that pumps blood through the circulatory system. Destruction of the heart is instantly fatal. 

Pawns can suffer from an [[artery blockage]], which reduces [[Blood Pumping|pumping efficiency of blood]], or from [[Injury#Heart Attack|heart attack]]s, which can be fatal if not treated.

==Acquisition==
{{see also|Human resources#Organ harvesting{{!}}Human resources}}
Heart items are harvested from live [[human]]s through [[surgery]]. The heart must be perfectly healthy in order to obtain the item; you won't retrieve a heart from a pawn with artery blockage, for example. This bill requires 1 of any type of medicine to perform. [[Doctoring#Success_chance|Success chance]] is dependent on a number of factors, including bed [[quality]], [[Room stats|room cleanliness]], and doctor skill - specifically the doctor's [[Medical Surgery Success Chance]]. Hearts can be directly harvested, but installing a [[prosthetic heart]] or [[bionic heart]] will also net an organic heart. Removing the heart, without replacing it, will kill the pawn.

Removing a heart from a guest or prisoner will decrease faction [[goodwill]] by 160 points, to a cap of -100; -80 for the surgery, and -80 for murder. Replacing a healthy guest's heart with a prosthetic only incurs the former penalty. Other colony members can get potentially tremendous [[mood]] penalties, which all stack:
: {{--|5}} for "Someone's organ harvested" (any organ); {{--|6}} if colonist
: {{--|6}} for "Someone organ-murdered"
: {{--|5}} for "Witnessed ally's death" (on colonist)
: {{--|4}} for "Observed corpse"
Pawns with the [[Bloodlust]] or [[Psychopath]] traits, or those with an [[Ideoligion]] with [[Ideoligion#Organ use|Organ Use: Acceptable]]{{IdeologyIcon}} are not affected by the harvesting of other people. Other Ideologion precepts may change moodlets for harvest and organ use.

Hearts can also be acquired through [[trading]] with faction settlements or Exotic Goods traders.

== Summary ==
The heart is a vital organ for humans. It accounts for up to 100% of a person's [[Blood Pumping]]. Blood Pumping has a 0.2x effect on [[Consciousness]], so losing 20% Blood Pumping means -4% Consciousness, which itself affects a variety of important stats. Blood Pumping has a direct impact (0.2x) on [[Moving]], and the loss of Consciousness further slows the pawn down (losing 20% Blood Pumping = -8% Moving). Finally, loss of Blood Pumping decreases the [[Rest Rate Multiplier]], making a pawn sleep for longer periods. Improving Blood Pumping past 100% increases Moving and Rest, but not Consciousness.

Hearts can be damaged by disease, drugs, or combat. Organic hearts are vulnerable to [[artery blockage]]s and [[heart attack]]s.

=== Installation ===
Installing the part requires {{ticks|2500}} of work, 2x medicine of [[Herbal medicine|herbal]] quality or better, and a [[Skills#Medical|Medical skill]] of 8.

Removing the part requires {{ticks|2000}} of work, 1x medicine of [[Herbal medicine|herbal]] quality or better, and has no [[Skills#Medical|Medical skill]] requirements.

If the operation fails, the part has a chance{{Check Tag|What Chance?}} to be destroyed. If the installation surgery fails, there is also a 25% chance that the patient dies. Thus, as the maximum [[Doctoring#Success chance|success chance]] of any surgery is capped at 98%, there is always at least a 0.5% chance of death per attempt.

== Analysis ==
Harvesting from a guest will inflict massive [[goodwill]] penalties, and harvesting from a colonist will bring even more [[mood]] penalties, so simply steal organs from a prisoner.

The [[prosthetic heart]] is inferior to an organic heart in function, and the [[bionic heart]] is superior, but both are immune to artery blockages and heart attacks, and installing one will cure both.  Installing a [[prosthetic heart]] on an otherwise healthy pawn inflicts no penalties on colonists/prisoners, but gives a -80 [[goodwill]] malus on guests from nonhostile factions.

There are also concerns installing a heart. Unlike the bionic heart, and like the prosthetic heart, there is a 25% chance of instant death in the event of failed installation. This makes it significantly riskier to install. Additionally, it requires a medical skill of 8 to attempt compared to the prosthetic heart's 4 and the bionic's 5.

Total destruction of the heart is instantly fatal, while Consciousness is a very important stat. Thus, you should replace damaged hearts as soon as possible. Pawns using [[wake-up]] or of old age are particularly vulnerable to heart attacks, so installing an artificial heart early may be helpful.

=== Trade ===
Hearts are worth {{icon Small|silver||{{Q|Heart|Market Value Base}}}}, worth exactly the same as a [[liver]]. However, the heart can be replaced by a [[prosthetic heart]]; by installing the prosthetic, you can obtain both the heart and the liver, or obtain a heart and keep the pawn alive.

A completely removed heart/liver will kill a pawn, and installing a prosthetic heart has a chance to kill. Therefore, it's best to harvest a [[kidney]] and a [[lung]] before taking the heart. This is worth {{icon Small|silver||{{Q|Lung|Market Value Base}}}} + {{icon Small|silver||{{Q|Kidney|Market Value Base}}}} + {{icon Small|silver||{{Q|Liver|Market Value Base}}}} = {{icon Small|silver||{{#expr: {{Q|Lung|Market Value Base #}} + {{Q|Kidney|Market Value Base #}} + {{Q|Heart|Market Value Base #}}}}}}, before accounting for [[Trade Price Improvement|Market Price]] or the prosthetic heart. This comes at the usual mood penalties, unless you have a colony filled with [[Psychopath]]s or a favorable [[Ideoligion]]{{IdeologyIcon}}. A Royal Tribute Collector{{RoyaltyIcon}} will ignore lost organs for sold prisoners, as long as they can walk.

== Version history ==
* [[Version/0.7.581|0.7.581]] - Item form added, and now harvestable.
* ? (Possibly 1.4) - Market value increased from {{Icon small|silver||500}} [[silver]] to {{Icon small|silver||1200}} [[silver]]. 

{{nav|body parts|wide}}
[[Category:Medical Item]] [[Category:Body Part]] [[Category:Organ]]