<s>[INST] For about five years I have experienced heavy palpitations and squeezing in my chest which is a result of sudden movement eg getting up very quickly from a sitting position. The symptoms are random as this doesn't happen every time. I have a history of stomach problems and experience a lot of bloating. Recently, these episodes which take about one minute to subside have become more frequent, sometimes being accompanied by pain in my calves which is a new addition to the symptoms. Can you please enlighten me as to the possible causes? [/INST] Hi and thank you so much for this query.Palpitations always result from the heart but they do not necessarily represent a disease of the heart. It could also be caused by other illnesses not related to the heart  especially stomach problems like gastritis, gastro-esophageal reflux disease, etc.It is difficult to tell what the cause of this is without a proper exam. Also, because the frequency is increasing and additional new symptoms showing up, i would suggest that you get consulted and be evaluated fully to idntify the cause and address it. I will suggest that you get consulted first by a general physician who would recommend seeing a specialist if it so warrants from more clues that he would gather during the encounter and some basic tests like ECG.I hope this answers your query and provides guidance on how to go about addressing this worry. I wish you well and feel free to ask me more questions if need be and I would gladly respond to them.Once ore thank you so much for this opportunity to exchange with you today.Dr. Ditah, MD </s>