Mitral Valve Interventions in Cardiac Care
Summary
The mitral valve, situated between the left atrium and left ventricle, plays a pivotal role in unidirectional blood flow. Disease of this valve, most commonly mitral regurgitation, affects millions worldwide and is associated with progressive heart failure, atrial fibrillation and increased mortality. Surgical repair or replacement has long been the gold standard, offering durable relief of regurgitation but entailing substantial operative risk. In recent years, minimally invasive, catheter-based therapies have transformed treatment options, particularly for patients deemed at high surgical risk. Transcatheter edge-to-edge repair employs a clip to approximate leaflet edges, mimicking the surgical Alfieri stitch, while transcatheter mitral valve replacement introduces a fully implantable prosthesis. Optimal outcomes rely on detailed imaging to assess valve anatomy, quantify regurgitant volume and characterise ventricular geometry. These interventions now span a continuum from high-precision imaging assessments to device innovation, reshaping clinical pathways and expanding access to therapy globally.
Research from Nature Portfolio
A recent consensus statement has standardised the use of cardiovascular magnetic resonance imaging (CMR) for mitral regurgitation assessment. Enhanced phase-contrast flow mapping and three-dimensional volumetric techniques have increased the accuracy and reproducibility of regurgitant volume measurements. By harmonising CMR protocols across centres, investigators have established benchmarks for ventricular remodelling and leaflet tethering that directly inform the timing and selection of interventional strategies. These advances support the integration of CMR alongside echocardiography, improving preprocedural risk stratification, guiding device choice and enabling rigorous follow-up evaluation of repair durability and ventricular reverse remodelling.
Mitral Valve Interventions in Cardiac Care publication trend
The graph below shows the total number of articles in mitral valve interventions in cardiac care across all publications each year (not limited to Nature Index journals).
Technical terms
Mitral regurgitation (MR): Leakage of blood backward through the mitral valve during ventricular contraction.
Transcatheter edge-to-edge repair (M-TEER): A catheter-based procedure that clips together the mitral valve leaflets to reduce regurgitation.
Transcatheter mitral valve replacement (TMVR): Percutaneous implantation of a prosthetic mitral valve for patients at high surgical risk.
Cardiovascular magnetic resonance (CMR): Advanced imaging modality that provides high-resolution assessment of cardiac structures and blood flow.
Secondary mitral regurgitation (SMR): Regurgitation resulting from ventricular or atrial pathology rather than primary leaflet disease.
References
- The Evolving Concept of Secondary Mitral Regurgitation Phenotypes Lessons From the M-TEER Trials. JACC Cardiovascular Imaging (2024).
- 1-Year Outcomes With Fourth-Generation Mitral Valve Transcatheter Edge-to-Edge Repair From the EXPAND G4 Study. JACC Cardiovascular Interventions (2023).
- Assessment of mitral valve regurgitation by cardiovascular magnetic resonance imaging. Nature Reviews Cardiology (2019).
- Early Experience With Transcatheter Mitral Valve Replacement: A Systematic Review. Journal of the American Heart Association (2019).
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