This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pediatrics
[{'content': 'A patient presents with LVH. and pulmonary complications. ECG, shows left axis deviation. Most likely diagnosis is – \nSelect and explain. \nA. TOF, B. Tricuspid atresia, C. TAPVC, D. VSD', 'role': 'user'}, {'content': "Answer: B \nExplanation: Congenital absence of tricuspid valve is called tricuspid atresia.\nHaemodynamics :\n\nThe inflow portion of R.V. is hypoplastic\nThe systemic venous blood coming to R.A. exits by way of a patent foramen ovale or an ASD.\nA VSD provides communication between L.V. and outflow portion of R.V.\nThe L.V. thus maintains both the systemic and pulmonary circulation.\nThe saturation of blood in the pulmonary artery and aorta is identical —> Because unoxygenated blood from right atrium mixes with oxygenated blood into left atrium.\nThe pulmonary blood flow is dependent on size of VSD —› Smaller the VSD, less the pulmoanry blood flow. Clinical features :\n\n\nChild is cyanotic from birth\nAnoxic spells and squatting may be present.\n\tFeatures suggestive of tricuspid atresia :\n\n\nL.V. type of apical impulse\nProminent large 'a' waves\nEnlarged liver with presystolic pulsations (a waves)\nECG characterised by Left axis deviation and Left ventricular hypertrophy.", 'role': 'assistant'}]