© 2003 by European Society of Cardiology
Supraventricular arrhythmia before and after surgical closure of atrial septal defects: spectrum, prognosis and management
1Divisione di Cardiologia Treviso, Italy; 2Divisione di Cardiochirurgia Treviso, Italy; 3Adult Congenital Heart Disease Unit, Royal Brompton Hospital London, U.K.
Supraventricular arrhythmias are often observed in patients before and after atrial septal defect repair. Although several papers report different incidences of sustained supraventricular arrhythmias, postoperative ‘incisional’ macrore-entrant tachycardias have not been systematically investigated.
METHODS: We reviewed 136 consecutive patients (79 female, 57 male, mean age 36·8±17·8 years) who underwent atrial septal defect repair at our institutions between January 1990 and January 1999. Coexisting valve disease requiring surgical intervention was noted in 13 patients (9·5%). The mean follow-up period was 78·8±30·1 months.
RESULTS: Sustained supraventricular arrhythmias occurred in 12 patients (8·8%) before surgery (atrial fibrillation in 11 patients). Using multivariate analysis the occurrence of arrhythmia significantly correlated with the presence of coexisting heart disease (P< 0·001) and age at surgery (P=0·011) After surgery sustained supraventricular arrhythmias were recorded in 16 patients (11·7%). Eleven of them had atrial fibrillation, permanent in 8 cases, 4 ‘incisional’ macroreentrant atrial tachycardia and 1 atrioventricular re-entry tachycardia. There was a significant correlation between pre and postoperative arrhythmia (P< 0·001). Two of the 4 patients with macroreentrant atrial tachycardia underwent successful radiofrequency catheter ablation, whereas the arrhythmia was controlled medically in the remaining 2 patients.
CONCLUSIONS: Atrial fibrillation remains the most frequent form of arrhythmia before and after surgical closure of atrial septal defects in adulthood, and relates to age at the time of repair and coexisting heart disease. Incisional macroreentrant atrial tachycardia is an identifiable, albeit less common, form of tachycardia, which can be treated by transcatheter ablation.
Key Words: Atrial septal defect, atrial tachycardias, atrial fibrillation, postsurgical tachycardias
Correspondence: Roberto Mantovan, MD, Divisione di Cardiologia, Ospedale Regionale ‘Ca’ Foncello', Piazzale Ospedale, 31100 Treviso, Italy. Tel.: +39.0422.322767; Fax: +39.0422.322662; E-mail: r.mantovan{at}serenacom.net, rvmman{at}tin.it
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