Hello, my name is Margie. In 2005 I had emergency Heart bypass surgery. Right after surgery I began having severe thoracic spine with, which I had never had befoe. Everyone played dumb as far as what it was. Having no answers I investigated it on my own. I have had MRI s, Cat Scans, Bone Scan, and regular X-rays, all negative. I am convinced that it is intercostal nerve damage. Would a nerve conduction test prove this?