in adults with congenital heart disease

Background: Supraventricular arrhythmia (SVA) is a frequent clinical complication in adult patients with congenital heart disease (CHD). The aim of this study is prognostic evaluation of congenital heart defect complexity, performed cardiac surgery, initial functional impairment of the heart — NYHA> I, cyanosis, age and sex of the adult patients with CHD, presenting for the first time to an outpatient clinic, on SVA occurrence during long-term observation. Methods: We looked at 1,304 patients (586 men), aged 18–72 years (mean 29.4 ± 10.6 years), and followed-up from 1995 to 2004. The mean observation period was 3.52 ± 1.83 years. SVA in the form of atrial flutter/fibrillation (FA/FLA) and supraventricular tachycar-dia was observed in 133 patients, 10.3 % of the study population. Ten-year follow-up showed that the likelihood of SVA occurrence in the whole studied population after two years was 5.2%, and 14.4 % after ten years. Results: Univariate analysis proved that the incidence of SVA is greater in patients with complex heart defects (p = 0.0001), those not previously operated upon (p = 0.0001), thos