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MediumCardiologyRheumatic mitral stenosisau-amcau-racp

A 25-year-old woman presents with exertional dyspnoea and palpitations. She migrated from a remote Northern Territory community where acute rheumatic fever is common. On examination there is a loud first heart sound and a mid-diastolic rumbling murmur with presystolic accentuation at the apex. Which valve lesion best explains these findings?

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