Impact of heart rate and atrioventricular delay on left ventricular diastolic filling in patients with dual-chamber pacing for sick sinus syndrome or atrioventricular block. - de Divitiis,M.; Galderisi,M.; Santangelo,L.; Mayer,M.S.; de Divitiis,O.; Iacono,A. (Am J Cardiol, 1998)