Today is my one-year anniversary since having open-heart surgery to repair a mitral valve that didn’t fully close when my heart pumped blood. I am all fixed now. No more blood regurgitating backward from the left ventricle through the floppy valve into the left atrium, as the left ventricle contracted. At times my heart was so exhausted it pumped 140 beats per minute at rest. That sends you into something scary called atrial fibrillation, a.k.a., “A-fib.” Yet I didn’t feel a thing. As a friend says, “You never know what you’re walking around with.” Until you do. Now I’ve got two heart scars, and not one but two memorable cardiac…