Conversation: The conversation between human and AI assistant.
[|Human|] For two years now I have had occasional faint dizzy feelings and none of the doctors seen can tell me why.  I just recently began having rapid racing heart upon waking - usually around 4 am.  I have noticed if I sleep propped up it doesnt race as fast when I wake up, but I do feel an increase. I have hormonal migranes, some mornings I have a spark in my eye that mirrors my heart beat.  I have a watch that measures pulse and it is around 150 bts per minute when this happens.  What type doctor should I see this time?
[|AI|]  Hi, This is Chat Doctor. Increased heart rate & palpitations can have a lot of causes. It can be normal sinus tachycardia due to anxiety or stress, or it could be abnormal supra ventricular tachycardia. Anxiety because of headache could be a cause in your case. But For the diagnosis, you need to do ECG at the time of palpitation & tachycardia. If the duration of palpitations are short enough to reach a nearby hospital, we put a 24hr ECG monitoring (Holder Monitor). You also need to do a 2D Echo & thyroid function test to see for any associated abnormality if any. Thanks