<prompt> A child presented at 10 weeks with recurrent episode of pneumonia and failure to thrive. X-ray show cardiomegaly pulmonary plethora diagnosis?VSDASDTOFPatent foramen ovale  <response>: - Features given in the question are suggestive of VSD VENTRICULAR SEPTAL DEFECT : - Communication bw 2 ventricles of hea - 90 are located in membranous pa of ventricular septum with variable extension into muscular septum. - Clinical features: Usually presents at 6-10 weeks of age Recurrent episodes of pneumonia Hea failure Failure to thrive X-ray showing cardiomegaly pulmonary plethora --MC congenital hea disease in children-- VSD --MC congenital acyanotic hea disease in children-- VSD --MC congenital hea diseases affected by infective endocarditis in children-- VSD 