ABC | Volume 114, Nº6, June 2020

Original Article Saad et al. Zero Fluoroscopy Catheter Ablation for Atrial Fibrillation and Supraventricular Arrhythmias Arq Bras Cardiol. 2020; 114(6):1015-1026 hospital discharge. CT scans were performed neither at baseline nor in the follow-up, while other radiation-free imaging methods were used at the discretion of the follow- up physician. Results No pericardial effusions, thrombotic complications, or other difficulties were seen in these series. All targets in both atria that needed ablation were reached and adequately visualized. All intended ablations were performed, meaning that the lack of fluoroscopic imaging did not hamper RF delivery. Those sites included the PV antra, LA posterior wall, anterior wall, septum, LA appendage, RA appendage, CS, Figure 4 – Mapping and ablation for supraventricular tachycardia. Ablation of an accessory pathway (WPW) in the mitral annulus is shown in the upper panel, where the ablation catheter (arrow) is positioned in the septal part of the annulus. RF application leads to the immediate elimination of conduction and normalization of the QRS (*). In the lower panel, an atrial tachycardia was mapped and ablated in the RA (arrow), with interruption of the arrhythmia (*) and return to normal sinus rhythm. MV – mitral valve. TV – tricuspid valve. SVC – superior vena cava. CS – coronary sinus. Table 1 – Patients’ characteristics Characteristics N = 95 Age (years) 60 ± 18 Male gender 58 (61%) Carto system 62 (65%) Navx system 33 (35%) Body Mass Index (BMI) 22.5 ± 2.8 Arterial Hypertension 71 (75%) Diabetes Mellitus 48 (51%) Ischemic Heart Disease 31 (33%) 1021