Descripton study of retrospective prospective type was performed for the period between January 2000 and April 2001. The objective of the study was to outline the frequency and characteristics of the sick sinus syndrome in our patients, by using the method of 24 hours dynamic electrocardiography. The group of 48 patients with diagnosed SSS was analysed, out of which there were 32 males and 16 females. The results obtained showed the morbidity incidence of 8,75% with average age of 62,5 years (presented by mean arithmetic value), with doubled frequency in males relative to females. The following rhythm distrubances, presented in absolute numbers, were found: sinus bradycardia 26 patients, sinus arrhythmia 4, SA block II grade 12, SA block III grade 1, AV block I grade 12, AV block II grade 6, AV block III grade 1, LAHB 7, LBBB 4, RBBB 14, bifascicular block 4, trifascicular block 2, AF 14, supraventricular premature beats 18, ventricular premature beats 24, nodal rhythm 3, tach-brady form 8, "systole" periods with RR interval >2 sec 19, while Adams-Stokes syndrome occurred in 2 patients during the monitoring process. Conclusion: Holter monitoring is indispensable method in diagnosing the sick sinus syndrome regardless its aetiology. In addition to that, nonhomogenous structure and plurality of electrocardiographic manifestations which might be the cause of the vital danger for the patients with this condition, indicate that it is compulsory method in selection of patients and possible electrophysiologic testing or pace-maker implantation.
Keywords: sick sinus syndrome, dynamic 24 hours EKG, frequency, characteristics, pacemaker.