Our insurance won't cover her surgeryPlease help

Please help.my wife has to have surgery to reconnect a valve back to her heart. We were just there the doctor decided at last minute he needed to do the surgery. After Erin waited 2hrs they told her our insurance won't cover it.we went from crying of excitement that they were going to help her so she can breathe and get back to normal daily activities, to driving home crying and praying for a miracle. If anyone can help even a dollar it adds up. Or at least share this. It might reach someone who can help.