50 y.o. M, new A-fib, depression/anxiety with many failed med trials... but all he and his wife care about is attention (and presumably getting stimulants, cardiac/stroke risks be damned)? Sounds about right.
Neuropsych testing isn't going to fulfill "due diligence" when it comes to malpractice, which is what I assume you mean. You alone decide to prescribe stimulants to someone with A-fib. What proof of serious impairment are you trying to overcome with stimulants? The serious risk of stroke must be outweighed. Sprinkle some Concerta, and his wife will 100% come back and say (and you document) that he pays better attention when she speaks. But no, that won't cut it.
Also, numerous failed med trials for anxiety/depression is likely pathognomonic for personality issues, coupled with being a 50 y.o. man who needs to bring his wife to his appointment. Is she present when he gets his prostate or colon checked, given the importance of those exams? When an adult brings someone into their psych appointment, especially in the context of controlled substances, it can be a form of aggression/pressure they are trying to apply to their psychiatrist.
Anyway, sorry lady, your husband needs to get depression/anxiety controlled before ADHD can be considered, he needs to do XYZ (i.e., therapy); after all that, if he has ADHD, we can consider guanfacine because I'm not risking your husband getting a stroke and turning into a drooling vegetable.