Three experiences of a pacemaker “Activitrax” which automatically increase its rate with physical activity

Abstract

Atrial synchronous pacemakers are benefical to give a physiological heart rate increase with exercise. However, there are some patients who cannot receive these benefit because of sinus dysfunction. Recently we have a chance to use the devise of which an internal transducer senses the quantity of physical activity and its circuit translates it into pacing rate. The device was implanted in three patients with sinus node dysfunction (2) and advanced A-V block (1) who subsequently demonstrated a physiological response with exercise and improved exercise tolerance.