Just hope you don't pass out and have an incompetent person try to perform CPR on you.
Rossi,
Thank you for the post.
(1) Only if you are having symptoms in that arm, such as weakness, coolness, or tingling.
(2) Perhaps. Other potential conditions that could cause this dizziness include carotid sinus syndrome, Meniere's disease, and benign positional vertigo.
(3) Gaining weight, drinking beer, and smoking would increase your blood pressure. But the fix would be worse than the problem.
(4) Yes -- at least until you have this evaluated by your doctor. Consider having a symptom-limited stress test to see if this brings on afib or the symptom you feel when exercising.
Hope that helps.