Conversation: The conversation between human and AI assistant.
[|Human|] My aunty underwent a cardiac surgery ( valve replacement) 3 months ago. All her health issues got recovered. She was perfectly alright after surgery. But for last 1 month, problem came by another way. She is suffering from severe sleeping disorder for more than 20 days... even after taking heavy sleeping dose she is not sleeping. she is not able to rest her head in the bed even just 5 min. how to get over this problem? which doctor i can contact in chennai?
[|AI|]  Hi, I understand your concern and would explain that it is important to differentiate between heart failure and a sleeping disorder, which can mimic this clinical situation.  For this reason, I recommend consulting first with her cardiologist for a physical exam, a cardiac ultrasound and NT pro BNP levels. It is also important performing pulmonary function tests and a chest X-ray study in order to exclude a possible lung disorder.  If all these tests result normal, I would recommend starting mirtazapine in low doses in order o help with sleep and anxiety. You should discuss with your doctor on the above tests.  Hope I have answered your query. Let me know if I can assist you further.