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Understand the result,
not just the number.
Pulmonary Regurgitation (1) Unless there are other reasons for RV enlargement. (2) Exception: acute PR. (3) Identifies a CMR-derived PR fraction >40%. (4) Steep deceleration is not specific for severe PR. (5) Not reliable in the presence of high RV end diastolic pressure. (6) Defined as the duration of the PR signal divided by the total duration of diastole, with this cutoff identifying a CMR-derived PR fraction > 25%. (7) Cut off values for regurgitant volume and fraction are not well validated. (8) RF data primarily derived from CMR with limited application with echocardiography. ASE Recommendations for Noninvasive Evaluation of Native Valvular Regurgitation (2017)
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