Po-686-02 the role of diastolic dysfunction in leadless pacemaker atrio-ventricular synchronous pacing

The Micra leadless pacemaker (Medtronic) is a single chamber ventricular device which recently has began offering atrio-ventricular synchronous pacing by relying on the detection of mechanical atrial contraction. While traditional devices rely on the presence of an atrial lead to detect atrial electrical activity, the Micra implements an accelerometer which detects tricuspid closure denoted as A1, aortic and pulmonic valve closure denoted as A2, passive ventricular filling denoted as A3 corresponding to the mitral E wave, and atrial contraction denoted as A4 corresponding to the mitral A wave.