Severe hypoxemia after radiofrequency ablation for atrial fibrillation in palliatively repaired tetralogy of Fallot: A case report

Figure 3 Preoperative pulmonary venous computed tomography angiography imaging. A: The right heart was significantly enlarged; B: Artificial blood vessel shadow can be seen on computed tomography angiography (orange arrow); C: The left side of the descending aorta is connected to the left pulmonary artery by an artificial vessel (blue arrow); D: The artificial blood vessel is visible between the right pulmonary artery and the right ventricle (yellow arrow).