What question did this study set out to answer?

To determine whether changes in aortic wall elasticity and dimensions account for the elevated threshold and reduced sensitivity of aortic baroreceptors in hypertensive rabbits.

May 1, 1968Acta Physiologica Scandinavica

Static Load‐Length Characteristics of Aortic Strips from Hypertensive Rabbits

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Why the study?

Do aortic strips from hypertensive rabbits exhibit different static load-length characteristics compared to normal rabbits?

Population

Hypertensive rabbits (3-15 days of arterial hypertension) and normal rabbits

Comparison

In vitro static load-length relationship testing… vs Aortic strips from normal rabbits

Design

Preclinical

Authors

HAHarald AarsUniversity of Oslo

Discussion

Member takes

Implication

Aortic wall stiffening may contribute to baroreceptor resetting in hypertension; animal findings leave open human relevance.

Key Points

To determine whether changes in aortic wall elasticity and dimensions account for the elevated threshold and reduced sensitivity of aortic baroreceptors in hypertensive rabbits.
Extracted circular aortic strips from the baroreceptor area of rabbits with arterial hypertension established for 3 to 15 days, alongside normotensive controls.
Assessed static load-length relationships and wall thickness under a 3-g stretch load in an in vitro experimental apparatus to calculate elastic modulus.
Aortic strips from hypertensive rabbits exhibited greater wall thickness than normal controls when stretched under a 3-g static load.
Strips from hypertensive animals demonstrated a significantly higher elastic modulus compared to normotensive strips, indicating marked mechanical stiffening of the aortic wall.
Calculations indicated that at any given blood pressure elevation, baroreceptor stimulation and subsequent nerve activity were reduced in hypertensive rabbits relative to normal controls.

Structured PICO

Do aortic strips from hypertensive rabbits exhibit different static load-length characteristics compared to normal rabbits?

Population

Hypertensive rabbits (3-15 days of arterial hypertension) and normal rabbits

Intervention

In vitro static load-length relationship testing of circular aortic strips from the receptor area

Comparator

Aortic strips from normal rabbits

Outcome

Thickness and elastic modulus of aortic stripssurrogate

Increased thickness and elastic modulus of the aortic wall in early hypertension may explain the resetting of aortic baroreceptor activity.

Limitations

In vitro conditions are not strictly comparable to in vivo conditions

Cite This Study

Harald Aars (1968) studied this question.

synapsesocial.com/papers/6a82d05c8aa2f088808d67d2 https://doi.org/10.1111/j.1748-1716.1968.tb04087.x

Topics

Hypertension management

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May 1, 1968Acta Physiologica Scandinavica

Static Load‐Length Characteristics of Aortic Strips from Hypertensive Rabbits

View Full Paper

Ask AI

Bookmark

Why the study?

Do aortic strips from hypertensive rabbits exhibit different static load-length characteristics compared to normal rabbits?

Population

Hypertensive rabbits (3-15 days of arterial hypertension) and normal rabbits

Comparison

In vitro static load-length relationship testing… vs Aortic strips from normal rabbits

Design

Preclinical

Authors

HAHarald AarsUniversity of Oslo

Discussion

Member takes

Implication

Aortic wall stiffening may contribute to baroreceptor resetting in hypertension; animal findings leave open human relevance.

Key Points

To determine whether changes in aortic wall elasticity and dimensions account for the elevated threshold and reduced sensitivity of aortic baroreceptors in hypertensive rabbits.
Extracted circular aortic strips from the baroreceptor area of rabbits with arterial hypertension established for 3 to 15 days, alongside normotensive controls.
Assessed static load-length relationships and wall thickness under a 3-g stretch load in an in vitro experimental apparatus to calculate elastic modulus.
Aortic strips from hypertensive rabbits exhibited greater wall thickness than normal controls when stretched under a 3-g static load.
Strips from hypertensive animals demonstrated a significantly higher elastic modulus compared to normotensive strips, indicating marked mechanical stiffening of the aortic wall.
Calculations indicated that at any given blood pressure elevation, baroreceptor stimulation and subsequent nerve activity were reduced in hypertensive rabbits relative to normal controls.

Structured PICO

Do aortic strips from hypertensive rabbits exhibit different static load-length characteristics compared to normal rabbits?

Population

Hypertensive rabbits (3-15 days of arterial hypertension) and normal rabbits

Intervention

In vitro static load-length relationship testing of circular aortic strips from the receptor area

Comparator

Aortic strips from normal rabbits

Outcome

Thickness and elastic modulus of aortic stripssurrogate

Increased thickness and elastic modulus of the aortic wall in early hypertension may explain the resetting of aortic baroreceptor activity.

Limitations

In vitro conditions are not strictly comparable to in vivo conditions

Cite This Study

Harald Aars (1968) studied this question.

synapsesocial.com/papers/6a82d05c8aa2f088808d67d2 https://doi.org/10.1111/j.1748-1716.1968.tb04087.x

Also Consider

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Topics

Hypertension management

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