Fig. 1

Freedom from repeat ablations. a Patients with structural heart disease vs. patients without structural heart disease. The rate of repeat ablations of the initially ablated arrhythmia did not differ significantly between patients with and without structural heart disease. Patients are censored at the end of their follow-up period. SHD patients with structural heart disease. b Subgroups of patients with structural heart disease vs. Patients without structural heart disease. Patients with dilated cardiomyopathy had a higher repeat ablation rate than patients without structural heart disease. The other subgroups did not differ significantly. Patients are censored at the end of their follow-up period. *p < 0.05 was considered statistically significant. DCM dilated cardiomyopathy, HCM hypertrophic cardiomyopathy, ICM ischemic cardiomyopathy, SHD patients with structural heart disease