How long heart after a person has died?!

Best Answer - Chosen by Voters

A person whose brain may have been irreversibly injured can now be kept alive by maintaining the circulation of oxygenated blood to the brain stem by artificial means.
According to modern thinking, if a person cannot spontaneously pick up and survive when the artificial means are withdrawn, he is presumed to be dead.
Clinical death is the medical term for cessation of blood circulation and breathing, the two necessary criteria to sustain life. It occurs when the heart stops beating in a regular rhythm, a condition called cardiac arrest.
Your question is incomplete.

http://en.wikipedia.org/wiki/Brain_death
http://en.wikipedia.org/wiki/Clinical_de…
http://en.wikipedia.org/wiki/Persistent_…
Parikh's Text Book of Medical Jurisprudence and Toxicology.

how long does heart pump after a person dies? how long do you have to save heart?

http://www.americanheart.org/presenter.j…

Your question doesn't make any sense. You might consider re-wording it and then posting it again if you want an accurate answer.