Hi Dr. Rynne, For the past few days, I have felt periodic vibration around where my heart is. No pain at all, and I check my pulse and my heart beat seems to be regular, even when I feel vibration. Not sure why this is happening so it is a bit concerning. I am 50, 5 9 , 280, with type 2 diabetes. I m on Metformin, and take insulin from a Dallas Diabetes Study.