<s>[INST] Hey, the past few months, my whole upper chest has started pounding along with my heart beating a lot faster then normal. It usually lasts a minute or two, then goes back to normal, approximately twice a day, but lately, it s been lasting a bit longer, and right now it s been going on for 10 mins. It makes me dizzy and tired and creates an.....uncomfort in my chest. Any ideas? [/INST] Hello, I don't know much about your medical history, but from what you are writing I recommend you to do a 24 h ECG Holter monitoring to see exactly what happens, and if needs meds or not. You might need cardiac sonography too. Hope I have answered your query. Let me know if I can assist you further. Regards, Dr. Anila Skenderi, General & Family Physician </s>