Key result
Mitral valve balloon dilatation increased Gorlin-derived aortic valve area from 0.57 to 0.73 cm2 (P=0.006), whereas continuity equation-derived area was flow-independent.
Why the study?
Does increasing transvalvar flow rate via percutaneous transvenous balloon dilatation of the mitral valve affect aortic stenotic indices in patients with combined aortic and mitral stenosis?
Observational (n=12)
No
Does increasing transvalvar flow rate via percutaneous transvenous balloon dilatation of the mitral valve affect aortic stenotic indices in patients with combined aortic and mitral stenosis?
Absolute Event Rate: 0.73% vs 0.57%
p-value: p=0.006
In patients with combined mitral and aortic stenosis, continuity equation-derived aortic valve area and catheterisation-derived valve resistance are less flow-dependent than Gorlin-derived area, making them more reliable indices for decision-making.
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Continuity equation aortic valve area is less flow-dependent than Gorlin; supports preferential use in combined stenosis but leaves clinical impact open.
Lee et al. (1996) conducted an observational in Combined aortic and mitral stenosis (n=12). Percutaneous transvenous balloon dilatation of the mitral valve vs. Baseline (before dilatation) was evaluated on Aortic valve area derived from the Gorlin formula (p=0.006). Mitral valve balloon dilatation increased Gorlin-derived aortic valve area from 0.57 to 0.73 cm2 (P=0.006), whereas continuity equation-derived area was flow-independent.
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