system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
A 17-year-old boy is brought to the pediatrician by his mother for an initial visit. He recently immigrated from Cambodia. Through an interpreter, the patient reports 6 months of mild exertional dyspnea. He denies chest pain or palpitations. His medical history is unremarkable and he has never had any surgeries. His family history is significant for hypertension and diabetes. His father died of tuberculosis. The patient’s vaccination history is unknown. His temperature is 98°F (36.7°C), blood pressure is 113/71 mmHg, and pulse is 82/min. His BMI is 24 kg/m^2. Physical examination shows a well-nourished, cooperative boy without any grossly dysmorphic features. Cardiac auscultation reveals a grade II systolic ejection murmur along the left upper sternal border and a mid-diastolic rumble along the left sternal border. S1 is normal and the splitting of S2 does not change with inspiration. Which of the following is the most likely diagnosis?
assistant
Atrial septal defect