A pulmonary venogram is shown in a patient who had a prior focal ablation procedure for atrial fibrillation at which time radiofrequency current was delivered in the left inferior pulmonary vein. The view is left anterior oblique. The contrast injection shows a focal stenosis of a superior branch of the left inferior pulmonary vein. A quadripolar electrode catheter can be seen in the left superior pulmonary vein and along the right atrial septum. The patient was asymptomatic.