Sorry guys, but a heart shot will drop blood pressure MUCH quicker than a lung shot...

zrex, get your "medical facts" straight.... The heart can in fact beat after a heart shot, due to the properties of heart muscle tissue (autorythmicity) i.e. the ability to initiate its own contractions. However with the degree of tissue damage, even if the heart is still beating, any blood it pumps will not go to the arteries, but rather out into the chest cavity and the arteries will actually drain towards the heart. All this takes place in a matter of 15-20 seconds and unconsiousness due to lack of blood supply to the brain will will drop the dear almost instantly.

A lung shot will also drop BP, however at a much slower pace due to the ability of the heart to remain pumping blood to the brain.