Key result
Arterial stiffness correlates with altered carotid mechanics, supporting the theory that it compromises BRS.
Why the study?
Evidence on whether arterial stiffness compromises baroreceptor sensitivity is scattered due to multiple methodological approaches for measuring both variables.
Observational (n=10)
This pilot study supports the physiological theory that increased arterial stiffness is associated with compromised baroreceptor sensitivity, though a larger sample size is required for definitive confirmation.
Answers are grounded in this paper and cite their sources.
May link stiffness to reduced BRS; hypothesis-generating in this cross-sectional pilot and requires larger prospective confirmation.
Baroreceptors, sensors that play a role in controlling arterial blood pressure (BP), are mechanical stretch receptors located in the aortic arch and carotid sinuses. Factors affecting the degree of stretch in the vessel wall with BP, such as increased arterial stiffness, may compromise baroreceptor sensitivity (BRS) to BP changes. Yet, evidence of this is scattered, as both baroreceptor sensitivity (BRS) and arterial stiffness are calculated variables with multiple methodological approaches. This pilot study (n=10) investigates the correlation of arterial stiffness and BRS using multiple BRS calculation techniques (spectral and sequence methodologies at aortic and finger sites) and arterial stiffness measurement [carotid-femoral pulse wave velocity (cfPWV), carotid compliance and distensibility]. BRS was assessed under resting BP conditions and during BP altered by maneuvers (0.1 Hz controlled breathing and leg ischemia). Magnitude of arterial stiffness - BRS correlation was positive for carotid distensibility and compliance, and negative for cfPWV, supporting the theory. A sample size of 100 participants (not rounded - exact figure by power calculation) would be required to confirm or reject all permutations of correlation between BRS by multiple calculation methods and large artery stiffness by PWV and compliance/distensibility measures.
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Desai et al. (2023) conducted an observational in Arterial stiffness and baroreceptor function (n=10). Multiple BRS calculation techniques and arterial stiffness measurements was evaluated on Correlation of arterial stiffness and baroreceptor sensitivity (BRS). Arterial stiffness correlated positively with carotid distensibility and compliance, and negatively with carotid-femoral pulse wave velocity, supporting the theory that stiffness compromises BRS.
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