Abstract 15142: Disagreement Among Echocardiographic Parameters of Mitral Regurgitant Severity is Associated With Discordance Between MRI and Echocardiography

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Introduction: Echocardiographic (Echo) parameters to determine the severity of mitral regurgitation (MR) may disagree. To this date, no study has determined the rate of disagreement of Echo parameters in patients with MR. Furthermore, no study has determined whether disagreement among Echo parameters is associated with discordance between Echo and MRI in assessing the severity of MR. Hypothesis: Disagreement of Echo parameters will be associated with discordance between Echo and MRI assessment of MR. Methods: This study included 115 patients (62 ± 14yrs, male 55%) enrolled in a prospective multicenter study of patients with MR who underwent Echo and MRI. Severity of MR by MRI was determined by regurgitant volume (mild Results: All nine Echo parameters agreed in 6 (5%) patients. There was agreement of 78-89% of parameters in 54 (47%) patients and 56-67% in 55 (48%) patients. There was a significantly lower agreement among Echo parameters in patients in whom there was a 2 grade difference between Echo and MRI compared to patients in whom Echo and MRI agreed (figure). Conclusions: There was significant disagreement among Echo parameters in almost half the patients with complete agreement among Echo parameters in only 5% of patients. Disagreement among Echo parameters was associated with discordance between Echo and MRI in the quantification of MR.

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