Chiari, Sjogrens, occipital neuralgia, central apnea, hypertension, tachycardia before ablation, urin. Retention, now vestibular disease. All related?

Tough question. It's unusual to have several separate uncommon conditions, as a coincidence, but it does happen. There's always a way to tie conditions together, into one condition or it's treatment. Nothing particular comes to mind, that catches all conditions separately, but a thorough history, physical examination, and review of all testing results, by your doctor can help answer the question. Take care.