| Pulmonary
Arterial Hypertension |
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| Rapid |
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| cutoff in |
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| size of |
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| peripheral |
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| vessels |
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| relative to |
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| size of |
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| central |
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| vessels |
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| Central
vessels |
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| appear too |
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| large for size
of |
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| peripheral |
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| vessels which |
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| come from |
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| them = |
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| Pruning |
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