Key result
The anterior leaflet of the mitral valve exhibits active contractile properties, including a beta-blocker-sensitive twitch and a sustained tone doubled by neural stimulation.
Why the study?
Are mitral valve leaflets active tissues capable of contractile activity in the beating heart?
Population
Beating heart model (specific organism not stated in abstract)
Comparison
Beta-receptor blockade and stimulation of the… vs Baseline/unstimulated state
Design
Preclinical
Authors
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MV leaflet contractility challenges passive model in assessment; leaves open role in human regurgitation.
Are mitral valve leaflets active tissues capable of contractile activity in the beating heart?
This study demonstrates that mitral valve leaflets are active, neurally controlled tissues rather than passive flaps, which may impact therapeutic approaches to mitral valve disease.
Itoh et al. (2009) studied Mitral valve physiology. Beta-receptor blockade and neural stimulation was evaluated on Leaflet contractile activity. The anterior leaflet of the mitral valve exhibits active contractile properties, including a beta-blocker-sensitive twitch and a sustained tone doubled by neural stimulation.
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