The 10 Worst Medical Mistakes on Grey's Anatomy

This is a biggie. Izzie cuts the LVAD wire on her hunky boyfriend, Denny, so he'll get sicker and get a higher ranking on the transplant list. Sure, he's handsome and their love story is one for the fairy-tale books, but if a real doctor did this, she'd be fired, stripped of her license, and would most likely face criminal charges. It's that serious.