Influence of atrial septal defect on mitral valve growthafter repair of coarctation of the aorta or an interruptedaortic arch in infants

Annular growth of the MV was not observed in patients who underwent single-ventricle palliation. In contrast, among patients who achieved BVR, those with a small preoperative MV annulus and low ASD pressure gradient demonstrated subsequent catch-up MV growth, suggesting that adequate left-sided preload is essential for MV development.