18 patients with sick sinus syndome(SSS)who recieved permanent pacing treat-ment accounted for 58。1%of all those who underwent pacemaker implantation in this hospital duringthis period. The most common cause of SSS in this series was idiopathic(66.1%). Syncope was foundin the most of patients(75.5%). The pacing treatment was the first choice for patients with severesymptoms. All the pacemakers used in the study were of VVl type. The average follow-up time was410/12 years
We found that all patients had a considerably long natural course.