Hi Arianna:
A lot of times when a person's body is under stress (or pain), it can cause heart palpitations. So I can see how having the underlying condition of gallstones could cause temporary heart palpitations. Gallstones can also cause radiating pain, which in turn it can feel like chest pain but is actually from your gallstones.
I am not certain if that is the case with you or not. I would visit with your doctor further to see what his/her thoughts are to make sure your palpitations are not serious. If they are not serious and you are going to have surgery, you can see if your symptoms subside after surgery.
Take care,
Tara
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