A secundum atrial septal defect is diagnosed on transthoracic echocardiography. The 12-lead ECG will show an incomplete right bundle branch block and right axis deviation (in contrast to the ...

2007;5(6):1135-1146. Diagnosing a secundum ASD is more often than not incidental because the defect normally causes symptoms late in adult life. Echocardiography and MRI have completely replaced ...

Less common than the secundum type atrial septal ... like that of pulmonic stenosis. A primum atrial septal defect is diagnosed on transthoracic echocardiography. The 12-lead ECG will show an ...