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El cumplimiento arterial central está asociado con diferencias relacionadas con la edad y el ejercicio habitual en la
K D Monahan1, H Tanaka, F A Dinenno
1Department of Kinesiology and Applied Physiology, University of Colorado at Boulder, Denver, USA.
Circulation
|October 3, 2001
Resumen
La sensibilidad del barorreflejo cardiovascular (BRS) disminuye con la edad, pero mejora con el ejercicio. El cumplimiento arterial, particularmente en la arteria carótida, está relacionado con estos cambios en el BRS relacionados con la edad y el ejercicio en los hombres.
Área de la Ciencia:
- Fisiología cardiovascular fisiología cardiovascular.
- Investigación sobre el envejecimiento Investigación sobre el envejecimiento.
- Ciencias del ejercicio Ciencia del ejercicio.
Sus antecedentes:
- La sensibilidad del barorreflejo cardiovascular (BRS) disminuye naturalmente con el envejecimiento.
- El ejercicio aeróbico habitual influye positivamente en BRS.
- El papel del cumplimiento de la arteria elástica en la modulación BRS relacionada con la edad y el ejercicio no se entiende completamente.
Objetivo del estudio:
- Investigar la hipótesis de que el cumplimiento de la arteria elástica está asociado con las diferencias relacionadas con la edad y el ejercicio en el BRS cardiovagal.
- Examinar la relación entre el cumplimiento de la arteria carótida y el BRS cardiovagal en hombres jóvenes y mayores entrenados en resistencia y sedentarios.
Principales métodos:
- Cardiovagal BRS fue evaluado utilizando la técnica de Oxford, relacionando el intervalo R-R a la presión arterial sistólica (SBP).
- Se midieron los SBP periféricos y centrales, junto con los cambios en el diámetro del lumen de la arteria carótida a través de la ultrasonografía.
- Se analizó el cumplimiento de la arteria carótida y la relación entre el intervalo R-R y el diámetro de la arteria carótida.
Principales resultados:
- El BRS cardiovagal disminuyó con la edad tanto en hombres sedentarios como en hombres entrenados en resistencia.
- Los hombres mayores entrenados en resistencia exhibieron un BRS cardiovagal más alto que sus contrapartes sedentarias.
- Los cambios en el diámetro del lumen de la arteria carótida por unidad de SBP aumentan las diferencias de BRS reflejadas, lo que indica variaciones de cumplimiento asociadas.
Conclusiones:
- Las diferencias relacionadas con la edad y el ejercicio habitual en el BRS cardiovagal están significativamente asociadas con las diferencias correspondientes en el cumplimiento de la arteria carótida.
- El cumplimiento de la arteria carótida juega un papel clave en la modulación del BRS cardiovagal en respuesta al envejecimiento y el ejercicio de resistencia en los hombres.
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