Euthanasia is also known as assisted suicide, physician-assisted suicide/dying, doctor-assisted suicide/dying, and more loosely termed mercy killing. It basically means to take a deliberate action with the express intention of ending a life to relieve intractable (persistent, unstoppable) suffering.
- Voluntary euthanasia is presumed to be conducted with consent, though some speculate if this is really the case given the complexity and ambiguity of today’s end-of-life documents or the mental state of the patient in question.
- Involuntary euthanasia is conducted without consent; the decision is made by another person because the patient is incapable to doing so himself/herself (http://www.medicalnewstoday.com/articles/182951.php). It should be clear, however, that if death is not intended, it is not an act of euthanasia.