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Relationship between myocardial flow reserve and diastolic dysfunction score. Based on echocardiographic parameters, each case was classified into five grades: 0–4. The parameters used for scoring were average E/e′ > 14, septal e′ velocity <7 cm/s, TR systolic jet velocity >2.8 m/s and left atrial volume index >34 mL/m2. None of the patients in the non-heart failure with preserved ejection fraction group scored 4 points.
