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[Vagal innervation in the human atrioventricular valves]
1Research Laboratory of Cardiovascular Pathology, Juntendo University School of Medicine, Tokyo.
Journal of Cardiology. Supplement
|January 1, 1992
Summary
Nerve fibers, likely from the vagus nerve, are widely distributed in human atrioventricular valves. This innervation may play a crucial role in maintaining normal valvular function.
Area of Science:
- Cardiovascular Anatomy
- Neurohistology
Context:
- The innervation of human atrioventricular (AV) valves is not fully understood.
- Previous research suggests vagal nerves may be involved in mitral valve prolapse syndrome.
Purpose:
- To microscopically investigate the innervation of human tricuspid and mitral valves.
- To characterize the distribution and morphology of nerve fibers within AV valves.
Summary:
- Histochemical staining for acetylcholine-esterase revealed a dense network of nerve fibers (2-50 microns) throughout the AV valves.
- Nerve density was highest at the valve ring, base, and commissures, with some fibers extending into the chordae tendineae.
- Specialized structures resembling sensory apparatuses were observed along thick nerve fibers in the leaflets.
Impact:
- Identifies acetylcholine-esterase positive nerve fibers, presumed to be vagal nerves, within human AV valves.
- Suggests a potential role for vagal innervation in regulating valvular function.
- Provides a basis for further research into the neuro-cardiac axis and valvular disease.