Mitral Regurgitation – Mild, Moderate Or Severe?
May 8th, 2009I just received an email from Tamara about diagnosing mitral valve regurgitation.
She writes, “Hi Adam – I was just diagnosed with moderate-to-severe mitral valve regurgitation. I’m an active, 64 year-old grandma that never even knew I had a heart valve problem. My cardiologist doesn’t believe I need surgery right away. Instead, he wants to monitor my mitral valve prolapse every six months with more echocardiograms. I’m curious to know, what distinguishes moderate regurgitation from severe regurgitation? Thanks, Tamara.”

Tamara raises an interesting point about diagnosing mitral regurgitation. Similar to other valvular diseases (e.g. aortic stenosis), there are three common categories by which regurgitation is defined. Those categories are mild, moderate and severe.
According to Dr. David Adams, a mitral valve specialist at Mount Sinai Hospital, the two main determinants in quantifying mitral regurgitation are:
- Regurgitation volume (RVOL): the difference between the mitral and aortic stroke volumes); and
- Effective regurgitant orifice (ERO): ratio of regurgitant volume to regurgitant time velocity integral
The table below shows how regurgitation volume and effective regurgitant orifice measurements are used to diagnose mitral regurgitation in patient’s with degenerative mitral disease.

Mitral Regurgitation Grading (Source: Dr. David Adams)
While traditional, two dimensional echocardiography with doppler is essential to determine the severity of mitral regurgitation, your cardiologist may elect to use transesophageal echocardiography (TEE) to confirm the diagnosis.
As you may be aware, mitral valve regurgitation is a relatively common valvular disorder. According to The Cleveland Clinic, about 2% of the population have mitral regurgitation.
I hope that helps Tamara (and perhaps you) better understand how mild, moderate and severe mitral regurgitation is diagnosed.
Keep on tickin!

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| About The Author: Adam Pick is a double, heart valve surgery patient and author of The Patient's Guide To Heart Valve Surgery. This unique book integrates clinical research with the personal experiences of 135 former patients to help future patients and their caregivers better understand the problems, the opportunities and the realities of heart valve surgery. To learn more about Adam and his heart valve surgery book, click here. |
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