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May 1, 1961Circulation Research

Effects of Exercise and Anemia on Coronary Arteries of Small Animals as Revealed by the Corrosion-Cast Technique

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Why the study?

Do exercise, anemia, or pharmacological agents alter the coronary arterial tree morphology in small animal models?

Population

Small animals including rats, 3-week-old ducklings, and guinea-pigs

Comparison

Chronic exercise, iron-deficient diet, thyroxin… vs Control animals

Design

Preclinical

Key result

Chronic exercise in rats and iron-deficiency anemia in ducklings resulted in a statistically significant increase in coronary-cast weight and arborization compared to controls.

Authors

JTJay TeppermanDPDavid S. Pearlman

Discussion

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Overview

Does not inform clinical practice; leaves open translation of coronary remodeling from animal models to humans.

Key Points

  • This research aims to study the effects of exercise and anemia on the coronary arteries of small animals using the corrosion-cast technique.
  • Vinyl acetate corrosion casts were prepared of coronary arterial trees from exercised and control rats.
  • Experiments included evaluating cast weight and heart-weight ratios in various animal models including anemic ducklings.
  • Coronary vascular structures were analyzed using the corrosion-cast technique to assess anatomical changes.
  • Exercised rats showed a significant increase in mean coronary-cast weight compared to controls (exact values not specified).
  • Anemic ducklings exhibited marked increases in cast weight and vascular arborization (exact values not specified).
  • Anastomoses were found in 75% of guinea pig hearts studied, indicating enhanced coronary circulation.

Structured PICO

Do exercise, anemia, or pharmacological agents alter the coronary arterial tree morphology in small animal models?

P
Population
Animal study evaluating the effects of exercise, anemia, thyroxin, and pentaerythritol tetranitrate on the coronary arterial trees of rats, ducklings, and guinea pigs using corrosion casts.
I
Intervention
Chronic exercise, iron-deficient diet (anemia), thyroxin injection, pentaerythritol tetranitrate injection, or coronary ligation
C
Comparator
Control animals
O
Outcome
Coronary arterial tree morphology assessed by vinyl acetate corrosion casts (including cast weight, cast/heart-weight ratio, vessel size, and arborization)surrogate

Chronic exercise and anemia induce structural enlargement and increased arborization of the coronary arterial tree in small animal models.

Cite This Study

Tepperman et al. (1961) studied this question. Exercise and Anemia vs. Control animals was evaluated on Coronary-cast weight and coronary-cast/heart-weight ratios. Chronic exercise in rats and iron-deficiency anemia in ducklings resulted in a statistically significant increase in coronary-cast weight and arborization compared to controls.

synapsesocial.com/papers/6a1f64e22865985bbe2ac83ahttps://doi.org/10.1161/01.res.9.3.576
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