Shear Wave Velocity Measurement Shows Promise for Assessing Heart Stiffness in Aortic Stenosis
A study published in *Open Heart* on June 19, 2026, found that ultrafast ultrasound shear wave elastography successfully measured myocardial stiffening in adults with congenital aortic stenosis, with moderate-to-severe cases showing higher shear wave velocities compared to healthy volunteers, according to researchers led by Robert R. Zwaan at Erasmus MC Universitair Medisch Centrum Rotterdam.
What Is Shear Wave Velocity and How Is It Measured?
Shear wave velocity (SWV) is a metric used to assess tissue stiffness. In this study, ultrafast ultrasound was employed to track shear waves in the interventricular septum after aortic valve closure, using high-frame-rate echocardiography recordings at 1000 Hz. A custom software analyzed 1.2-second segments to calculate SWV, with results compared between 68 adults with congenital aortic stenosis and 19 healthy volunteers.
Key Findings From the Study
– Feasibility: SWV was measured in 73% of patients with native aortic valves, 53% of those with post-aortic valve replacement, and 100% of healthy volunteers.
– Stiffness Correlation: Patients with moderate-to-severe aortic stenosis had a median SWV of 4.7 m/sec, compared to 3.4 m/sec in healthy volunteers (P = .035).
– Factors Affecting Measurement: Older age and higher BMI reduced SWV feasibility (P < .001 and P = .015, respectively).
How Does This Impact Clinical Practice?
While the technique shows potential as a non-invasive tool for monitoring pressure-overload cardiomyopathies, researchers noted limitations, including variability due to image quality and manual steps like identifying aortic valve closure. “Although image quality, measurement variability and lack of standardisation currently limit widespread application, SWV [shear wave velocity] has considerable promise as a biomarker for early detection, disease monitoring and therapy evaluation in pressure-overload cardiomyopathies,” the researchers wrote.
What Are the Study’s Limitations?
The research relied on regional measurements of the interventricular septum, which may not have reflected global left ventricular stiffness. Additionally, manual input was required for key steps, and spatial resolution constraints affected image quality in some patients.
Why Does This Matter for Patients With Aortic Stenosis?
The study’s findings align with efforts to refine non-invasive diagnostics for cardiac conditions, though further validation is required.
What’s Next for Shear Wave Elastography?
Funding for the study came from the Netherlands Cardiovascular Research Initiative, backed by the Dutch Heart Foundation and Hartekind. Additional support was provided in part by the Dutch Research Council. The authors did not declare any competing interests.
FAQ: Understanding Shear Wave Velocity in Aortic Stenosis
- What is congenital aortic stenosis?
- A condition involving the aortic valve.
- How does shear wave velocity relate to heart health?
- Higher shear wave velocities suggest myocardial stiffening.
- Is this technique ready for widespread use?
- Not yet. The study highlights that image quality, measurement variability and lack of standardisation currently limit widespread application.
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