the test you speak of is really a very simple one and would show any
blockage in the carotid artery. but as usual not full proof. nothing
to fear but i doubt that it would be anything but negative for you. it
is very common for people to get faint etc when blood drawn so dont
worry you are ok but just your body metabolism and your fears reacting.
nothing wrong with you . best to stay away from doctors unless you
really need them but most importan really is basically your blood
pressure. if that is ok you are pretty safe otherwish unless you really
have to go for something of great imprortance. but do have the blood
pressure under contol as it is a SILENT KILLER IF TOO HIGH.