... closed by surgical correction via patch repair of the ASD. Now, with ASD closure devices, they can be closed through a short ... occluder, umbrella-shape, the waist diameter in accordances with the ASD size, conventient to operate.2) Consisted of metal wire mesh ... or equal to 3 years.2) Patients are diagnosed as ASD by clinical diagnosis, electrocardiogram, chest film or transthoracic echocardiography, ...