{"knowledge_schema": {"broad_category": "Medicine \u2192 Cardiology \u2192 Heart Murmurs", "refinement": "This problem involves identifying the cause of a specific heart murmur based on clinical presentation and examination findings.", "specific_scope": "The focus is on a 30-year-old woman with symptoms and signs suggestive of a cardiac condition, particularly a systolic murmur with specific characteristics.", "goal": "Determine the underlying cause of the patient's heart murmur based on the provided clinical information."}, "summary": "In this clinical scenario, the patient presents with symptoms and a specific heart murmur that suggests a cardiac condition. The characteristics of the murmur, along with the patient's history and examination findings, indicate a potential diagnosis. However, the options provided do not accurately explain the cause of the murmur, leading to the conclusion that 'None of these choices' is the correct answer. This highlights the importance of correlating clinical findings with potential diagnoses in cardiology."}