Original Research
Editorial Comment
Grading Severity of Mitral Regurgitation by Echocardiography: Science or Art?

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Key Words

effective regurgitant orifice area
mitral regurgitation
proximal isovelocity surface area
vena contracta width

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Dr. Grayburn has received grants from Evalve, Inc., GE Ultrasound, and Philips Ultrasound.

Editorials published in JACC: Cardiovascular Imaging reflect the views of the authors and do not necessarily represent the views of JACC: Cardiovascular Imaging or the American College of Cardiology.