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Fig. 1B. —Left superior pulmonary vein occlusion and venous infarction after radiofrequency ablation in 31-year-old man with refractory atrial fibrillation. Contrast-enhanced CT scans (2.5-mm collimation, lung window) show scattered ground-glass opacities and focal peripheral consolidation in left upper lobe consistent with venous infarction. Note thickened interlobular septa (arrows) visible on C.