Catheter ablation is a well established therapeutic option for the treatment of supraventricular tachycardias in symptomatic patients refractory to antiarrhythmic drug therapy. A major limitation of catheter ablation is the procedure length with significant exposure to fluoroscopy. The radiation exposure can be harmful to professionals and patients. These risks include acute and subacute skin injury, as well as radiation-induced cancer and genetic abnormalities [ 1 Mahesh M. Fluoroscopy: patient radiation exposure issues. Radiographics. 2001; 21: 1033-1045 Crossref PubMed Scopus (286) Google Scholar , 2 Kovoor P. Ricciardello M. Collins L. Uther J.B. Ross D.L. Risk to patients from radiation associated with radiofrequency ablation for supraventricular tachycardia. Circulation. 1998; 98: 1534-1540 Crossref PubMed Scopus (161) Google Scholar ]. Three-dimensional reconstruction systems of the cardiac chambers, which allow visualization of the electrodes catheters, have been introduced to facilitate the mapping and ablation procedure and in several studies have demonstrated to reduce the fluoroscopy time during ablation of supraventricular and ventricular tachycardias. The aim of this study was to evaluate the trend in fluoroscopy time, over a six year period, during radiofrequency catheter ablation of supraventricular tachycardias, performed, in a high volume center, by three different experienced operators.