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EasyCardiologyHeart failure phenotypingca-mccqe1ca-rcpsc-im

A 55-year-old man with long-standing hypertension and diabetes presents with shortness of breath and ankle swelling. He has bibasal crackles, elevated jugular venous pressure, and bilateral pitting oedema. Which investigation best distinguishes heart failure with preserved ejection fraction from heart failure with reduced ejection fraction?

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