I agree with the others who have said that it depends on the circumstances. The default assumption, I guess, is that anyone who has died (especially suddenly and accidentally) would want all efforts made to resuscitate him. However, if a person dies a long, lingering, painful death and has given clear instructions that he not be resuscitated, then efforts to revive him would seem unethical and perhaps even illegal.
I assume you are talking about CPR resuscitation and not the Frankenstein type of operation. I find it medically acceptable in every way. My father once brought one of his co-workers "back from the dead" after the man was electrocuted while working on a downed electric power line. My dad gave the man CPR and got his heart started again. This happened in the 1950s, and though my dad died many years ago, his co-worker is still alive today. Whenever he sees me, he tells anyone around him that I am "the son of the man who saved my life."
This is a massive ethical issue, as if we want to do what is best for the patient, it might not actually be to resuscitate them whatever the cost or the implications. Certainly the individual's wishes should be respected, but at the same time we need to be aware of how when somebody's natural life comes to an end we should perhaps just let nature take its course with certain patients, especially the elderly who are reaching the end of their lives anyway.
There are living wills which allow people to make it clear what measures they want taken if the situation ever arises that they are clinically dead or near dead. A living will stipulates that the person doesn't want any extraordinary measures to be taken to extend life. This can be hard for families to deal with, but it does honor the wishes of the person receiving treatment.
It depends on the situation. If I were to get badly hurt but I could be resuscitated and eventually get back to health, then I would like to be "brought back from the dead." But if I were getting really old or really ill and I couldn't live on my own, I wouldn't want to be "brought back" because it would really seem like it was just my time to go.
I'm not sure exactly what you are asking. If you are referring to reincarnation, I personally do not believe in it. If you are talking about using CPR or other measures to bring someone who is "clinically dead" back to life, as in during surgery or on an accident scene - I think that is a harder question. Ideally, the wishes of the individual would be honored. Some people don't want any extraordinary measures used, ever, to prolong their life. Others want everything possible done.
Personally, I love my life and pray that I will be able to share life with the people and activities I love for many years to come, but I'm eager to rejoin my parents and others in worshipping Jesus on a different level when I die. I don't want any special efforts taken to delay that reunion.
Dying is considered as an art in Srimadbhagavatam, a scripture of Hinduism. Death of material body is also called a regeneration. Therefore, we should not try to cause any harm to natural process. Let people realize that if we are born, we are bound to die. This realization only can make us not to aspire more of the material world. We, those who are alive, have been depressed having seen the present scenario of the world. Those who have died have got rid of it all. Let them be in peace.
Death is a mystery and let it be so. There lies the beauty. We know we are mortal and we have witnessed so many dying in front of us and we ignore this process. I feel myself like an animal in a slaughter house busy eating grass. I hear the sound of the animal slaughtered and look at it but again begin eating grass the next moment.