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PubMed This is a summary of 21 peer-reviewed journal articles Updated
Cardiology

Demystifying Your Imaging: A Patient's Guide to Echo and MRI Reports

At a Glance

Echocardiography is the usual first test for mitral valve prolapse and measures leaflet displacement and mitral regurgitation. Cardiac MRI can clarify uncertain findings and assess heart function, annular disjunction, and scarring.

Reading a cardiac imaging report can feel like trying to decode a foreign language. However, these documents contain the precise “map” of your heart’s anatomy. By understanding a few core metrics, you can have an informed conversation with your cardiologist about your risk and treatment timing.

The First-Line Test: Echocardiography

The primary way doctors confirm Mitral Valve Prolapse (MVP) is through an echocardiogram (an ultrasound of the heart). To meet the official definition, the echocardiogram must show displacement of at least one leaflet by at least 2 millimeters beyond the annular plane in the appropriate long-axis view [1][2].

A complete report should describe which parts of the valve are affected. You might see terms like “P2” or “A2,” which refer to specific sections (scallops) of the valve leaflets [3]. It should also note if the leaflets are “thickened” or “redundant,” which helps distinguish between different types of MVP [4].

Measuring the Leak: Mitral Regurgitation (MR)

Many people with MVP have some degree of “leakiness” where blood flows backward through the valve. Doctors grade this Mitral Regurgitation on a scale from trace to severe [5]:

  • Trace/Mild: Small amounts of backflow that are common [6].
  • Moderate: An intermediate stage where the leak is significant enough that the doctor will watch closely for changes in the size of your heart chambers [7].
  • Severe: A substantial leak. While a regurgitant volume of 60mL or more is one common criterion for severe MR, your medical team uses a multiparametric approach—integrating effective regurgitant orifice area, vena contracta, pulmonary-vein flow, and chamber response—to assign a final severity grade [8][9].

The “Watching” Numbers: LVEF and LVESD

For patients who have chronic severe primary mitral regurgitation, your cardiologist uses specific measurements of the left ventricle to decide if the valve issue is starting to strain your heart. These guideline triggers help determine when it is time to stop “watching” and start “acting” [10]:

  • Left Ventricular Ejection Fraction (LVEF): This is the percentage of blood the heart pumps out with each beat. For severe MR, an LVEF that drops to 60% or lower is a sign of early weakness [10][11].
  • Left-Ventricular End-Systolic Diameter (LVESD): This measures the size of the heart chamber when it is finished contracting. If this number reaches 40mm or higher, it suggests the heart is beginning to stretch or enlarge under the pressure of the leak [10][11].

(Note: These 60/40 thresholds are chiefly guideline triggers for severe primary MR. They do not automatically apply to isolated MVP, mild MR, or moderate MR, and a valve-team decision determines intervention.)

Advanced Imaging: MAD and MRI

In some cases, your doctor may order a Cardiac MRI (CMR). Echocardiography is the usual first-line test, while CMR is a complementary reference method used when echo images or MR grading are discordant or uncertain [2][12].

Two specific findings on an MRI or advanced Echo help your doctor assess individual risk:

  1. Mitral Annular Disjunction (MAD): This is a dynamic finding showing a separation between the valve’s base and the heart muscle [13]. While MAD is common in MVP, a larger measurement is sometimes associated with more frequent extra beats [14][15].
  2. Late Gadolinium Enhancement (LGE): During an MRI, a contrast dye is used to look for microscopic scarring (fibrosis) in the heart muscle or the papillary muscles [16][17]. This finding, combined with the complete clinical picture, helps assess if your MVP requires more frequent rhythm monitoring [18][19].

Imaging Completeness Checklist

When you receive your report, you might see these items. Routine echocardiograms may not assess or quantify every advanced metric (like MAD), so do not use this checklist to judge report quality or make treatment decisions without your cardiologist:

  • [ ] Leaflet displacement (expressed in mm) [2].
  • [ ] LVEF and LVESD (chamber function and diameter) [10].
  • [ ] MR Grade (Trace, Mild, Moderate, or Severe) [5].
  • [ ] Left Atrial Volume (to see if the upper chamber is enlarging) [5].
  • [ ] Presence/Absence of MAD [20].
  • [ ] Pulmonary Artery Systolic Pressure (if Doppler signal allows) [21].

Common questions in this guide

What test usually confirms mitral valve prolapse?
An echocardiogram, which uses ultrasound to create images of the heart, is usually the first test used to confirm mitral valve prolapse. The diagnosis generally requires at least one mitral leaflet to move at least 2 millimeters beyond the valve’s normal ring in the appropriate view.
What does the mitral regurgitation grade on my report mean?
The grade describes how much blood leaks backward through the mitral valve, ranging from trace or mild to severe. Moderate leakage is usually watched for changes in the heart chambers, while severe leakage is determined using several measurements rather than a single number.
What do LVEF of 60% and LVESD of 40 mm mean in severe mitral regurgitation?
For chronic severe primary mitral regurgitation, an LVEF of 60% or lower or an LVESD of 40 millimeters or higher can indicate that the left ventricle is beginning to strain. These are guideline triggers for discussion with a valve team, not automatic instructions to have an intervention, and they do not apply in the same way to isolated MVP or mild or moderate leakage.
When might I need a cardiac MRI for mitral valve prolapse?
Echocardiography is usually the first-line test, but cardiac MRI may help when echo images are unclear or different tests do not agree about the amount of leakage. MRI can also measure blood flow more precisely in some cases and look for areas of heart-muscle scarring.
What are MAD and LGE on an MVP imaging report?
Mitral annular disjunction, or MAD, is a separation between the base of the mitral valve and the heart muscle; larger measurements may be associated with more extra heartbeats. Late gadolinium enhancement, or LGE, is an MRI finding that can show fibrosis or scarring, including in the papillary muscles, and may help guide rhythm-monitoring decisions when considered with the full clinical picture.

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References

References (21)
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This page is for informational purposes only and does not constitute medical advice about your mitral valve prolapse imaging. Your cardiologist or valve team should interpret your report and advise whether further testing or treatment is appropriate.

Guide contents mitral valve prolapse
Research & Literature
02 Recognizing Symptoms and Knowing When to Act 04 Arrhythmic Mitral Valve Prolapse