It is inaccurate to characterize Terri Schiavo as a "disabled" person. Her brain is destroyed (with the esception of her brain stem). Her eeg is flat. She cannot have an MRI because of the implant in her brain (the magnet would suck it right out). The alternative is brain surgery before any MRI. Her family loves her so much, they choose to think her reflexive movements and groans are responses. It's tragic beyond words. Had they stopped shocking her heart after the 3rd or 4th try in 1990, we wouldn't be here today.
There is a time not to do cpr...
I would have been more comfortable with that diagnosis with a PET scan or MRI, nonetheless. If this happened to my husband I would insist on it before I could decide the next step.