Conversation: The conversation between human and AI assistant.
[|Human|] I seem to be getting a random noticable heart beat in my chest every couple of days. Noticable in the sense that i can feel the thump in my chest but for only one beat. When this happens i feel light headed breifly and am suddenly able to take in a very large breath of air. I am 21, a smoker, 5"10 about 145lb and am in fairly good health.
[|AI|]  Thanks for your question on Chat Doctor. I can understand your concern. In my opinion, we should definitely rule out arrhythmia (rhythm disturbances in heart) in your case because arrhythmia can cause thumping feeling in chest with light headdress. And arrhythmia is also common in smoker. So consult doctor and get done 1. ECG. 2. 2d echo 3. Holder monitoring (24 hours continuous recording of ECG). If all these are normal then no need to worry about arrhythmia or other heart diseases. Sometimes, stress and anxiety can also cause similar symptoms. So avoid stress and tension, be relaxed and calm. Don't worry, you will be alright. Quit smoking as soon as possible as it is not a good habit. Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.