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Biaxial Mechanical Characterizations of Atrioventricular Heart Valves
Published on: April 9, 2019
Innervación de las válvulas atrioventricular y arterial humana
K Marron1, M H Yacoub, J M Polak
1Department of Histochemistry, Royal Postgraduate Medical School, Hammersmith Hospital, London, UK.
Circulation
|August 1, 1996
Resumen
Las válvulas cardíacas humanas poseen patrones nerviosos únicos con funciones sensoriales y autónomas. Esta inervación, particularmente cerca de las células de la válvula, sugiere una influencia potencial en la función de la válvula cardíaca.
Área de la Ciencia:
- Investigaciones cardiovasculares en la investigación cardiovascular.
- La neuroanatomía es la neuroanatomía.
- Histología Histología Histología.
Sus antecedentes:
- Existen datos limitados sobre la inervación de la válvula cardíaca humana.
- La relación entre las fibras nerviosas y los componentes funcionales de las válvulas es poco conocida.
Objetivo del estudio:
- Para investigar los patrones de inervación de las válvulas atrioventriculares y arteriales humanas.
- Explorar la asociación de las fibras nerviosas con los elementos celulares dentro de los prospectos de las válvulas.
Principales métodos:
- Se empleó inmunohistoquímica cuantitativa, histoquímica y microscopía confocal.
- Las válvulas atrioventriculares y arteriales humanas fueron analizadas postmortem y durante la cirugía.
Principales resultados:
- Se observaron variaciones significativas en la densidad y distribución nerviosa dentro y entre las válvulas cardíacas.
- Los nervios estaban ubicados en capas específicas de los prospectos (atrial para las válvulas AV, ventricular para las válvulas arteriales) y no alcanzaban el borde libre o el núcleo fibroso.
- Se identificaron terminales nerviosos con morfología variable y marcadores neuroquímicos específicos (acetilcolinesterasa, tirosina hidroxilasa, neuropéptido Y), estrechamente asociados con las células endoteliales, del músculo liso y de los fibroblastos.
Conclusiones:
- Las válvulas cardíacas humanas exhiben patrones de inervación distintos, que incluyen componentes sensoriales y autónomos primarios.
- La presencia de terminales nerviosos y su proximidad a las células de la válvula sugieren un papel potencial en la regulación de la función de la válvula.
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