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A-G, Selective pulmonary angiograms obtained from two different patients (A-D and E-G) during balloon pulmonary angioplasty. A, E, Selective pulmonary angiograms showing occlusion of the posterior left lower lobe pulmonary artery before balloon angioplasty. B, C, F, Wire passed through the occlusion and vessels treated with balloon inflation. D, G, Selective angiograms obtained after balloon angioplasty showing improved blood flow in the left lower lobe.
