My last breast reconstruction was a seminar on circulation. Several times a day, the nurses would come in with dopplers and listen. My heartbeat sounds crisp, like someone biting into an apple. The venous pulse in my tissue flaps hit the same beat, but vaguely, a brush on the drums. The arterial pulse sounded like the wind circling the top of a hill. These are the sounds of everything going wrong. I went home flat…