<s>[INST] For the past 3 weeks i have felt like my heart stops then i loose my breath it is a very odd feeling in my chest. This is becoming a more common occuring up to 8 times per day at rest or whilst engaged in activity. I am 37 with no previous conditions. I am starting to feel dizzy - could this be related and should i see a doctor? [/INST] Hi Their have read your query and I want to suggest you that you need to get an ECG done and check your SERUM ELECTROLYTES also and consult a cardiologist in person. If anything doesn't show up on ECG I would like to do a 24hr ECG monitoring (HOLDER MONITORING) to rule out if any rhythm abnormality going on and an ECHOCARDIOGRAPHY also to see for LV function and structural integrity of the heart. Good Luck </s>