Which are the causes of Mitral Valve Prolapse Syndrome?

TL;DR: Mitral Valve Prolapse Syndrome (MVPS) occurs when the mitral valve leaflets thicken or stretch, preventing them from closing tightly, often due to connective tissue abnormalities. While the exact cause is frequently idiopathic (unknown), it is strongly linked to genetic predispositions and underlying connective tissue disorders.

What are the primary causes of Mitral Valve Prolapse Syndrome?

The core mechanism of Mitral Valve Prolapse Syndrome involves "myxomatous degeneration," where the tissue of the heart valve loses its structural integrity. Think of it like a sail on a boat that has become too stretchy or oversized; instead of catching the wind (or in this case, blood flow) firmly, it billows backward into the left atrium. While doctors often cannot pinpoint a single environmental cause, the condition is frequently categorized into primary (genetic/structural) and secondary (associated with other diseases) forms.

Is Mitral Valve Prolapse Syndrome hereditary?

Genetic factors play a significant role in many cases of Mitral Valve Prolapse Syndrome. Research indicates that approximately 30% to 50% of individuals with the condition have a family history, suggesting an autosomal dominant pattern of inheritance in some families. Specific genetic loci, such as those on chromosomes 11p15, 16p11-p12, and 13q31-q32, have been identified in studies of affected families.

What are the risk factors and triggers?

It is important to distinguish between the cause (the underlying structural change) and risk factors (conditions that increase the likelihood of developing or exacerbating the syndrome). Known associations include:

• Connective Tissue Disorders: Individuals with Marfan syndrome, Ehlers-Danlos syndrome, or Loeys-Dietz syndrome are at a significantly higher risk for Mitral Valve Prolapse Syndrome.


• Skeletal Abnormalities: Conditions like pectus excavatum (sunken chest) or scoliosis are often observed alongside the syndrome.


• Autoimmune/Metabolic Factors: While less common, certain systemic inflammatory conditions may contribute to valve degradation.

What is current research revealing about the etiology?

Medical researchers are currently utilizing advanced genomic sequencing to better understand the specific mutations driving Mitral Valve Prolapse Syndrome. Current studies are focused on how mutations in the FLNA (filamin A) gene and others involved in TGF-beta signaling pathways lead to the weakening of heart valve tissues. At DiseaseMaps.org, our community of 23 members with Mitral Valve Prolapse Syndrome continues to help track these experiences, highlighting the diverse ways this condition manifests across different populations.

Next steps

• Consult a cardiologist for an echocardiogram to assess the severity of the valve prolapse.


• Discuss your family medical history with a genetic counselor, especially if connective tissue disorders are present.


• Join our community at DiseaseMaps.org to connect with others and share experiences regarding managing Mitral Valve Prolapse Syndrome.

Medical disclaimer: This information is for educational purposes only and does not replace professional medical advice, diagnosis, or treatment.

References

• NIH Genetic and Rare Diseases Information Center (GARD): Mitral Valve Prolapse


• Orphanet: Myxomatous mitral valve disease


• OMIM (Online Mendelian Inheritance in Man): Mitral Valve Prolapse, Familial


• American Heart Association: Mitral Valve Prolapse Overview