Conversation: The conversation between human and AI assistant.
[|Human|] My vision keeps going fuzzy and then my sight goes completely black for about 10 seconds, whilst this is happening I loose my balance and go dizzy. This has been happening for about a year now, when it first started I fainted whilst this was taking place. I visited my local doctor and had a blood test and an ECG but he said he doesn t know what could be, he told me to go back if it was to continue. Since then it has got worse- do you know what it could be? I also get really cold hands and feet during the winter and my fingers turn white and then bright blue (it feels like someone is burning my hands) do you know what this could be as well?
[|AI|]  Hello, The symptoms you describe seem to correspond to pre-syncope, which is usually due to a temporary lack of blood flow or metabolic issues.  An ECG was a good starting point but since the episodes are continuing more prolonged monitoring of heart rhythm is advised through 24-48 hour Holder ECG portable device.  A heart ultrasound might be needed as well. Some routine blood tests are also usually done for metabolic origins. As for the finger changes, it sounds like the Maynard syn Chat Doctor.  It may be isolated but more often is part of other conditions, like hematological connective tissue disorders, so more blood tests on that regard are needed as well. Hope I have answered your query. Let me know if I can assist you further. Take care