The VogonMom and VogonDad are at the hospital with him. I talked to Vogon on the phone and he sounds all right. He had FOUR more bags and three tablets of potassium since I left this morning, plus other medications. Imaging so far includes a CT and X-ray (he had these last night and I forgot to ask if he meant them or had more done), MRI, another ECG and is about to have an EEG. He says they may have seen something anomalous at the site of his 2005 head injury.
Don't know if he'll be released tonight or tomorrow, but I feel a lot better with his folks in town.