Key result
Aortopulmonary shunt placement in lambs resulted in exaggerated pulmonary arterial pressure responses, medial thickening, and hyperproliferation of pulmonary artery endothelial cells compared to controls.
Why the study?
Patients exposed to increased pulmonary blood flow and pulmonary arterial pressure develop pulmonary vascular disease more commonly than those with increased flow alone, prompting investigation into the physiologic and molecular effects of these differing mechanical forces.
Population
Lambs and derived pulmonary artery endothelial cells
Comparison
LPA ligation vs aortopulmonary shunt placement vs controls
Design
Preclinical animal model study
Authors
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Distinguishes flow- versus pressure-driven pulmonary vascular changes in CHD models; leaves open translation to clinical management.
Different mechanical forces (increased flow vs. increased flow and pressure) in congenital heart disease models drive distinct physiologic, histologic, and molecular pulmonary artery pathologies.
Kameny et al. (2019) studied Congenital heart disease and pulmonary vascular disease. Left pulmonary artery ligation or aortopulmonary shunt placement vs. Control lambs was evaluated on Hemodynamic, histologic, and molecular responses. Aortopulmonary shunt placement in lambs resulted in exaggerated pulmonary arterial pressure responses, medial thickening, and hyperproliferation of pulmonary artery endothelial cells compared to controls.
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