April 19, 2017 Keesler medics implant Air Force’s 1st Micra Pacemaker The Keesler Medical Center became the first Air Force hospital to implant the world’s smallest pacemaker for patients with bradycardia April 13.Bradycardia is a condition characterized by a slow or irregular heart rhythm, usually fewer than 60 beats per minute. At this rate, the heart is unable to