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1 = Upper sinus venosus defect 2 = Lower sinus venosus ... A secundum atrial septal defect is diagnosed on transthoracic echocardiography. The 12-lead ECG will show an incomplete right bundle ...
1 = Upper sinus venosus defect 2 = Lower sinus venosus ... A primum atrial septal defect is diagnosed on transthoracic echocardiography. The 12-lead ECG will show an incomplete right bundle ...