<s>[INST] hi my heart pounds, i feel breathless the get a pounding head ache. This can happen whilst watching tv, or lifting items, walking the dog. It is also becoming more often and lasting longer too. is it anything to worry about, i keep leaving it , with it getting more often !!!! [/INST] Hello! Thank you for asking on Chat Doctor! I would like to know your age. Do you have any family history for cardiac disease? Your symptoms may be related to a cardiac arrhythmia. Anxiety can not be excluded as a possible cause. I recommend consulting with your GP for a careful physical examination, a resting ECG, a chest x-ray and some blood lab tests (complete blood count, thyroid hormone levels, fasting glucose, kidney and liver function tests, blood electrolytes, etc.). An ambulatory 24-48 hours ECG monitoring is necessary to rule in/out a possible cardiac arrhythmia. Further, tests like a cardiac ultrasound should be done if the diagnosis of cardiac arrhythmia is confirmed. If all the above tests result normal, the most probable cause of your symptomatology would be just anxiety. Hope to have been helpful! Best regards,  </s>