Hi, I am a male, 31 years, 5'11" 78 kg. In the recent past times I see my heart rate fluctuating too much. My fitness band records 139 bmp to 40 bmp at least 4-5 times in a week. Have been concerned over the same. I do smoke but have not consumed alcohol in months. I do feel pressure like weight been put on my chest but have been only 2-3 occasions.

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