<s>[INST] What are the most common causes of heart palpitations? Mine only began a few weeks ago. They get better for a few hours during and after I exercise, but then they come back. I am taking medications for high blood pressure and have changed them recently - could that be it? a [/INST] Hello, A most common cause of palpitation is anxiety, panic attacks, cardiac disease. I would advise you not to exercise during an episode of palpitation, instead of a rush to the hospital to get urgent ECG (electrocardiograph ). It will help you to find out the cause of the palpitation. A proper evaluation to find out the cause of palpitation is very important. Goodnight eight hours sleep, healthy nutritious diet, and adequate water intake and mediation along with your blood pressure medicine should help you. Also, since you are hypertensive, decrease salt intake in your diet. Keep yourself engaged with your favorite hobby instead of worrying about palpitation.   Hope I have answered your query. Let me know if I can assist you further.Regards, Dr. Aparna Amritsagar </s>