I had a rapid heartbeat in morning today and then accompanied by dull left upper side chest pain. Rapid heartbeats subsided after few minutes but this dull chest pain keeps on and off through out whole day. Right now I have this dull pain too. I could able to brisk walk with this pain in the evening but the pain didn't subside. I take metoprolol for my heartbeat. And have Echo a month back which came normal and coronary angiography 4 months which only showed myocardial bridge. Is it still heart related ? These pain gets me panicked often.