<s>[INST] I randomly get a flutter in the middle of my chest.  It almost feels like a fish flipped flopped inside me.  The flutter is not accompanied by any pain, but I do feel it takes by breath away.  I have had numerous EGKs done and they have are been normal.  The flutter, could that be a muscle that is just spasaming? [/INST] Thanks for your question on Chat Doctor. I can understand your concern. No need to worry about cardiac diseases because your multiple ECG s are normal. Possibility of involuntary muscular contractions is more in your case. Common causes for this are low calcium and magnesium level. So get done serum calcium and magnesium level. If deficiency than you need supplements. If both are normal than sometimes stress and anxiety can also cause fluttering sensation in chest. So avoid stress and tension. Be relax and calm. Don't worry, you will be alright. First rule out calcium and magnesium deficiency. Hope I have solved your query. Wish you good health. Thanks. </s>