Abstract

Background: Vasa vasorum (VV) cannot only be found in systemic arteries but also in pulmonary arteries, in which they originate from the bronchial arteries. Subject of this study is the influence of bronchial artery blood supply on the muscle tone of pulmonary artery vessel walls and resulting changes in pulmonary artery pressure (PAP). We hypothesized that hypoxic perfusion of the bronchial artery (BA), and therefore of the VV of the pulmonary artery (PA), leads to pulmonary artery smooth muscle cell dysfunction, causing an increase in PAP.

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