me too. Some will argue that you need all of your organs to be resurrected in the world to come. Then we think of the 6 million who were turned to ash during the Shoah and many will say, "oh, they are the exception." However, i would think that if one saves a life in that manner, it should also be the exception.
On the other hand, one will claim that the life saved might be an evil monster and not a righteous person therefore the act itself is nullified.
I would rather err on the side of life if I could put my two cents in if i could save a life without ending mine with the exception of being brain dead and only machines keep me alive.