Key result
In an experimental canine model of acute mitral regurgitation, the mitral regurgitant area decreased monotonically to 59% of its initial value, closely paralleling the decrease in ventricular volume.
Why the study?
Does the mitral regurgitant area vary dynamically with ventricular volume during systole in acute mitral regurgitation?
Population
5 open-chest dogs with acute mitral insufficiency created by excising a portion of the anterior leaflet
Comparison
Creation of acute mitral insufficiency and… vs Control study using a tilting-disc prosthesis…
Design
Preclinical
Authors
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Challenges fixed-orifice assumption in acute MR; leaves open translation from canine models to patient management.
Does the mitral regurgitant area vary dynamically with ventricular volume during systole in acute mitral regurgitation?
In acute mitral regurgitation, the mitral regurgitant orifice area is not fixed but decreases dynamically in parallel with ventricular volume during systole.
Yellin et al. (1979) studied Acute mitral regurgitation (n=5). Acute mitral regurgitation (experimental model) vs. Control study using a tilting-disc prosthesis with a 5 mm hole was evaluated on Mitral regurgitant area (MRA) variation during ventricular ejection. In an experimental canine model of acute mitral regurgitation, the mitral regurgitant area decreased monotonically to 59% of its initial value, closely paralleling the decrease in ventricular volume.
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