Back in March 1972, I had a single jump of the right coronary artery. My sternum was wrapped with Teflon coated nylon which did not work well. It stretched. My surgeon (Pascal Spagna from Episcopal Hosp in Phila) later told me it was something they experimented with a found did not work.
It is (if you add the numbers) almost 40 years later. I had weird feelings in my sternal area while recovering, and after almost 40 years, 13 grandkids, 4 wives and a career with plenty of activities which still includes skiing off 13,000 ft Mtns and 36 years in Respiratory Care, I still get weird stuff happening. It usually occurs after a long hard day. I get electrical like impulses that will run from just below my sternum and rocket up across my upper chest, sometimes with such force that will have me bounce up off the bed. The impulses will sometimes run across my clavicle area. I get no dysrhythmias from these episodes. If you have ever heard or experienced this from anyone you or your colleagues have care for, please touch bases with me.
I am probably the longest living bypass surgery recipient---I was only 33 when I had a heart attack--hence my continued activities at 72 years of age.