text: The<unk>  is an effective imaging modality to show an ASD, as well as other details such as the defect size, the direction of flow, the speed of the flow, and what therapies might be of best use. There are some disadvantages to the use of<unk> .
option_0: Atrial septal defect doppler
option_1: Atrial septal defect M-mode
option_2: Patent ductus arteriosus echocardiography
option_3: Atrial septal defect contrast echocardiography
option_4: Patent ductus arteriosus physical examination
option_5: Atrial septal defect transcranial doppler ultrasound
option_6: Tetralogy of fallot echocardiography
option_7: Bicuspid aortic stenosis echocardiogram