i was laying in bed lastnight and i had a heart palpatation (which i have had for many years) and then it felt like a big bubble going through my heart. I first thought of blood clot. It was not really painful, just a weird feeling like a bubble of air flowing through my heart and then top left ventrical..
Thanks for your question on Chat Doctor. I can understand your concern. In my opinion, we should first rule out heart diseases in your case because your symptoms are classical of angina pain. So get done ECG, 2d echo and stress test (trade mill test). If all these are normal then no need to worry about heart diseases. Sometimes stress and anxiety can also cause similar symptoms. So consult psychiatrist and get done counselling sessions. Try to identify stressor in your life and start working on its solution. You may need anxiolytic Chat Doctor.  Avoid stress and tension, be relaxed and calm. Don't worry, you will be alright. First rule out heart diseases. Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.