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EasyCardiovascularAortic stenosisuk-plab-1

A 66-year-old woman presents with progressive exertional dyspnoea and chest tightness. On examination she has a slow-rising carotid pulse, soft second heart sound and an ejection systolic murmur loudest at the right upper sternal edge radiating to the carotids. What is the single most appropriate investigation to confirm the diagnosis?

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