Most of the characteristics we have are the inherited ones from our ancestors with genes, so you might have some problems similar to your parents. At your age, the situation you described look totally healthy as pulse rate of 90/min is in normal range. Probably you have been under control by your doctor because of your vasomotor instability disorder
but getting dizzy in changing postures at your age is also totally normal. Do not worry about anything but have your health check-ups done routinely.