What question did this study set out to answer?

To determine how metabolic signals during graded exercise regulate intrinsic vascular tone and segmental resistance across large-bore resistance arteries, arterioles, and veins in skeletal muscle.

February 1, 1989Acta Physiologica Scandinavica

Metabolic control of large‐bore arterial resistance vessels, arterioles, and veins in cat skeletal muscle during exercise

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Population

Cat gastrocnemius muscle

Comparison

Graded exercise vasodilatation via somatomotor… vs Resting state and post-exercise period

Design

Preclinical

Authors

JBJ. BjörnbergLund University MMM. MASPERSLund University SMStefan MellanderNU Hospital Group

Discussion

Member takes

Implication

Does not alter clinical practice; leaves open translation of metabolic capillary pressure control to human exercise.

Key Points

To determine how metabolic signals during graded exercise regulate intrinsic vascular tone and segmental resistance across large-bore resistance arteries, arterioles, and veins in skeletal muscle.
Monitored feline gastrocnemius muscle microcirculation using continuous recordings of arteriolar pressure, capillary pressure, and segmental vascular resistances.
Categorized vascular segments into proximal arterial resistance vessels (>25 µm), arterioles (<25 µm), and veins.
Induced graded exercise vasodilatation via low- to high-frequency somatomotor nerve stimulation and tracked resistance dynamics at rest, during stimulation, and throughout recovery.
Light exercise selectively decreased intrinsic tone and vascular resistance in arterioles (<25 µm), whereas higher workloads recruited dilation in proximal arterial vessels (>25 µm) and veins.
Segmental tone redistribution reduced the pre- to post-capillary resistance ratio, causing capillary pressure at 100 mmHg arterial pressure to rise by an average of 14 mmHg above the resting baseline of 15.4 ± 0.6 mmHg at peak vasodilatation.
Vascular tone recovery following exercise occurred more rapidly in proximal arterial vessels and veins than in the arteriolar segment.

Structured PICO

Population

Cat gastrocnemius muscle

Intervention

Graded exercise vasodilatation via somatomotor nerve stimulation

Comparator

Resting state and post-exercise period

Outcome

Arteriolar and capillary pressures, and vascular resistances in proximal arterial resistance vessels, arterioles, and veinssurrogate

In cat skeletal muscle, graded exercise causes a segmental redistribution of intrinsic vascular tone, leading to increased capillary pressure.

Cite This Study

Björnberg et al. (1989) studied this question.

synapsesocial.com/papers/6a898741d76717fba3eb24ee https://doi.org/10.1111/j.1748-1716.1989.tb08555.x

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Metabolic control of large‐bore arterial resistance vessels, arterioles, and veins in cat skeletal muscle during exercise

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

Metabolic control of large‐bore arterial resistance vessels, arterioles, and veins in cat skeletal muscle during exercise

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

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