Conversation: The conversation between human and AI assistant.
[|Human|] For the last 2 months I have experianced palpitations on waking during the night. Sometimes they wake me up. They can last for a few hours and only normalise when I get up. I am only getting around 4 to 5 hours sleep at night. This then leads to felling light headed and feeling as if I am falling off somewhere. I am 64 and very active.
[|AI|]  Hello! Thank you for your question on Chat Doctor! I understand your concern and would like to explain that your symptoms may be related to a cardiac arrhythmia. Another cause to exclude are possible sleep disorders with autonomic dysfunction. I recommend consulting with your GP for a careful physical examination, a resting ECG and some lab tests: complete blood count, thyroid hormone levels, fasting glucose, blood electrolytes, kidney and liver function tests. An ambulatory 24-hour ECG monitoring would be necessary to rule in/out a possible cardiac arrhythmia. If all the above tests are normal, a polysomnography should be performed for a possible sleep disorder with autonomic dysfunction. Hope to have been of help! Feel free to ask any other questions whenever you need! Best wishes,