An EKG, 2D ECho of the heart, carotid duplex scan of the neck vessels, a TEE to rule out a
patent foramen ovale ,determination of kidney function, a 24 hour urine collection, coagulation factor levels,thyroid hormones,serum sodium levels may need to be determined.
Watch your diet.Decrease salt intake and exercise daily.Brisk walking for 20 minutes at most days of the week may be beneficial.
I suggest that you be evaluated further for your condition.