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Leadless pacemakers have been approved for many years. They have predominantly been ventricular single-chamber pacemakers; the Medtronic leadless pacemaker uses an accelerometer algorithm to sense the atrial contraction, but that device cannot pace the atrium. Now, a manufacturer-sponsored, prospective, multicenter, single-group study evaluates a dual-chamber leadless pacemaker.
Three hundred patients received a right ventricular pacemaker and a separate right atrial pacemaker. Implantation was successful, and communication established, in 295 patients (98.3%). The atrial pacemaker had excellent results: The primary performance endpoint — ≥70% atrioventricular synchrony at 3 months — was met in 90% of patients. The primary safety endpoint — …