An atrial septal defect of the secundum type is relatively common and occurs from failure of the septum secundum to develop. This results in a communication between the left and right atrium ...
Expert Rev Cardiovasc Ther. 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 ...
An atrial septal defect should show a right bundle branch block, or RBBB ― sometimes incomplete ― on ECG. This is partially due to the right ventricular volume and pressure overload that occurs.
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