Abstract
Forty cases of pacemaker implantation were performed for the past 2 years in Himeji Brain and Heart Center. 18 cases requied 22 program changes in total with 6 different parameters. 22 cases did not need program change. Eleven cases received rate program change and hysteresis programing, of which 8 cases (72%) had episodes of palpitation. Six cases required pulse width and pulse amplitude changes, 5 cases of which (83%) were due to diaphragm stimulation. The mode and refractory period changes were performed in 5 cases, of which 3 cases were because of tachycardia episodes. The prolongation of atrial refractory period was especially effective to prevent the tachycardia due to pacemaker reentry.
