[Table/Fig-4]:

A 13-year-old male patient presenting with exertional dyspnoea, diagnosed with atrial septal defect on echocardiography and MDCT: (a) Diagrammatic representation of secondum of atrial septal defect; (b) Plain radiograph shows mild cardiac enlargement, increased pulmonary arterial markings (arrows) and mildly dilated main pulmonary arterial segment(open arrow).