“…Patients with congenital heart disease (CHD) who have undergone corrective and/or palliative surgery are at risk of developing different types of tachyarrhythmias, and their invasive management can represent a challenge to the electrophysiologist because of their complex anatomy, extensive surgical reconstructions, and use of intracardiac and extracardiac baffles and shunts, which limit conventional access to the cardiac chambers 1 . In cases in which there are interruptions or anomalies of the inferior vena cava (IVC), a superior approach or a retrograde aortic arterial access to gain entry into the cardiac chambers may be used, but catheter stability and manipulation can prove very difficult in comparison with a standard femoral venous approach 2, 3, 4, 5, 6, 7…”