I m looking for the name of a vascular issue that my son was just diagnosed with... His veins enlarge which causes the blood to have a difficult time returning. This caused delusions, paranoia, and episodes of passing out. His EKG showed that the top chambers of his heart were not working during the episodes and all cardio tests came back with good results. Dehydration was also a major factor. He has just been released from the hospital but he nor his mother can remember/pronounce the name. I m trying to find out what it is called.