Fig. 4From: Short-term results of interventional therapy for infants (7–36 months old) with patent ductus arteriosus and moderate-to-severe pulmonary hypertension: a retrospective studyTransthoracic echocardiography results after occlusion. The red arrow indicates the occluder. There was no residual shunt after occlusion. PA, pulmonary artery; AO, aortaBack to article page