Pulmonary arterial imaging before and after percutaneous balloon pulmonary angioplasty (BPA). a) Pre-procedure pulmonary angiogram demonstrating an intra-arterial.

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Pulmonary arterial imaging before and after percutaneous balloon pulmonary angioplasty (BPA). a) Pre-procedure pulmonary angiogram demonstrating an intra-arterial fibrous “web” lesion; b) the corresponding intravascular ultrasound image showing the intravas... Pulmonary arterial imaging before and after percutaneous balloon pulmonary angioplasty (BPA). a) Pre-procedure pulmonary angiogram demonstrating an intra-arterial fibrous “web” lesion; b) the corresponding intravascular ultrasound image showing the intravascular filling defect; c) the BPA balloon in place; d) pulmonary angiogram after the BPA procedure, showing the patent arterial lumen. Irene Lang et al. Eur Respir Rev 2017;26:160119 ©2017 by European Respiratory Society