Diagnosis of diastolic dysfunction was made with the following characteristics: mild (impaired relaxation without increased filling pressure), moderate (impaired relaxation with moderate elevation of filling pressure or pseudo-normal filling pressure) and severe (advanced reduction in compliance or reversible or fixed restrictive filling).
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4167149/

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Note added at 59 mins (2019-02-01 13:18:37 GMT)
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pressures