Clinicopathological Correlation of Chronic Thromboembolic Pulmonary Hypertension: A Retrospective Study.

Thrombi and atherosclerosis were dominant in UCSD level I PEA materials, and a decreasing trend was observed from proximal (UCSD level I or II) to distal (UCSD level III) types of diseases, whereas recanalized neo-vessels were more frequently observed in UCSD level III cases ( Figure 2 ).

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