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From: Dani'
Yes, I faint or have pre-faint symptoms pretty much every day. first I feel something like water on my head, I get really pale, my vision gets funny,sometimes i get facial pressure, then everything gets slow and my pulse drops (40, 38 last night) then it speeds way back up later (120s-160s), I guess as I am coming out of it, and my hands shake really bad. Now I feel pain in my esophagus or stomach area with it. I usually don't pass out all the way but when i was younger I would pass out often especially after only drinking a little bit of alcohol. I also passed out at girl scout camp once when I got too hot.
When I was little I used to faint and they said I had an arrhythmia but was not a disease process. Now my EKGs are changing so not sure what to think. The dr.s don't think the arrhythmia is causing the vasovagal episodes but my heart drops w/them. I had an angiogram to check for blockage where they run a wire up from your groin to your heart. That was normal.
Diabetes Insipidus is supposed to be rare, herte is some info, I can see how it could cause vv if I get dehydrated even drinking huge amounts of water!-
Diabetes insipidus (DI) is an uncommon condition that occurs when the kidneys are unable to conserve water as they perform their function of filtering blood. The amount of water conserved is controlled by antidiuretic hormone (ADH, also called vasopressin).
ADH is a hormone produced in a region of the brain called the hypothalamus. It is then stored and released from the pituitary gland, a small gland at the base of the brain.
DI caused by a lack of ADH is called central diabetes insipidus. When DI is caused by failure of the kidneys to respond to ADH, the condition is called nephrogenic diabetes insipidus. The major symptoms of diabetes insipidus are excessive urination and extreme thirst. The sensation of thirst stimulates patients to drink large amounts of water to compensate for water lost in the urine.
Central diabetes insipidus is caused by damage to the hypothalamus or pituitary gland as a result of surgery, infection, tumor, or head injury. Although rare, central DI is more common than nephrogenic DI.