Hello Everyone. I'm new to the Forums. I've been looking at the posts alot since August when I was told I had POTS. Seems Helpful But I do Have some Questions. Hope someone can help. I've been sick off and on for about as long as I can remember. I always went to the doctor and was told I had the Flu, Sinus infection. sometimes sent home with anitbiotics and that's it. It seemed like I was always comming down with the flu ALOT I thought. A little over a year ago I almost passed out twice in one day. I did not go to the Hospital, just home to bed, was very extremley Dizzy and nauseated and had a headache that could kill a moose. So a week later I went to My family Doctor. I was told this was vertigo, probally left over from a viral infection so I was sent home, The next week Still VERY SICK went back to the Doctor They ordered a brain scan, Came back OK, sent me to a Nerologist Seen Him for Migraine. I explained to him that It is the Dizziness and Nausea that start first tham after a while I get a Headache too. So I did not feel it was just a Headache. So I get sent for lots of tests Hearing Sight, they came out OK. Then Went for a Tilt Test I only Lasted 4 minutes. They could not do a second part of the test because right before I passed out I got very upset and Loud, I was scared I felt myself shutting down, Could not breathe, Felt like I was going to die. So they stopped the test I guess right when I passed out. I remember waking up all sweaty and cold, Here is what they say EKG showed Sinus Arrythmia, What is that? I tolerated 70 degrees tilt for only 4 minutes, Flattening of T durning Hut, What's that? Then they did a Blood Volume Test They say I have Postural Venous Pooling, Probably normal autonomic reflexes. They have me on Lopressor and on effexor. Is this a Heart Problem or a Circulation Problem? Also, Can I get a Stroke from this also? Thanks.