Diameter and shunt act as an alleviator of pulmonary hypertension: an echocardiography assessment of patients with ostium secundum atrial septal defect by Espinola-Zavaleta, N E Z, Antonio-Villa, N E A V, Guerra, E C G, Alexanderson-Rosas, E A R, Bracamontes-Castelo, G B C, Avendano-Perez, L A P

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