In patients with sinus node disease, dual-chamber pacing (DDD) possibly results in adverse effects on the ventricular function. We have compared the incidence of cardiovascular morbidity and mortality in patients with sinus node disease and with atrioventricular (AV) synchronous pacemakers, DDD vs. atrial pacing (AAI).
Clinical Epidemiology Unit, Department of Medicine, Karolinska Institutet and Karolinska University Hospital, Site Solna M9:01, SE-171 76 Stockholm, Sweden. Michael.Fored@ki.se