What question did this study set out to answer?

This study aims to investigate the regional variations in cardiac myocyte size across different species.

September 1, 1987The Anatomical Record

Comparison of regional differences in cardiac myocyte dimensions in rats, hamsters, and guinea pigs

Q: What is the clinical evidence from this study?

Study design: Other. Intervention: Regional variations (Right ventricle vs Left ventricle vs Atria) vs. Left ventricle. Primary outcome: Cell volume, cell length, and cross-sectional area (p=<0.01).

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Key result

Compared to the left ventricle, right ventricular myocyte length was shorter in rats and hamsters (P<0.05) but longer in guinea pigs (P<0.01), with significant transmural gradients in rats.

Authors

SCScott E. CampbellFacility for Rare Isotope Beams AGA. Martin GerdesPhiladelphia College of Osteopathic Medicine TST SMITHUniversity of South Florida

Discussion

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Implication

RV-LV myocyte length differences vary by rodent species; leaves open translational relevance to human ventricular remodeling.

Key Points

This study aims to investigate the regional variations in cardiac myocyte size across different species.
Prepared isolated myocytes from Sprague Dawley rats, golden Syrian hamsters, and Hartley guinea pigs.
Measured cell volume, cell length, and calculated cross-sectional area using a Coulter Channelyzer.
Analyzed dimensions comparing left ventricle, right ventricle, and atrial regions.
Rats and hamsters showed shorter right ventricular cell lengths compared to the left ventricle (P<0.01 for rats; P<0.05 for hamsters).
Guinea pig atrial cell length was shorter than that of the right ventricle (P<0.01) but not different from left ventricle length.
In rats, a transmural gradient of cellular dimensions existed in the left ventricle, with endomyocardium largest (P<0.01).

PICO

Population

Isolated cardiac myocytes from Sprague Dawley rats, golden Syrian hamsters, and Hartley guinea pigs.

Exposure / Comparator

Regional variations (Right ventricle vs Left ventricle vs Atria) vs Left ventricle

Primary Outcome

Cell volume, cell length, and cross-sectional area, p=<0.01

Main Result

p-value: p=<0.01

Cite This Study

Campbell et al. (1987) studied this question. Regional variations (Right ventricle vs Left ventricle vs Atria) vs. Left ventricle was evaluated on Cell volume, cell length, and cross-sectional area (p=<0.01). Compared to the left ventricle, right ventricular myocyte length was shorter in rats and hamsters (P<0.05) but longer in guinea pigs (P<0.01), with significant transmural gradients in rats.

synapsesocial.com/papers/6a6a96f7c068f641bcf4085d https://doi.org/10.1002/ar.1092190110

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Comparison of regional differences in cardiac myocyte dimensions in rats, hamsters, and guinea pigs

Discussion

Member takes

Implication

Key Points

PICO

Main Result

Cite This Study

Comparison of regional differences in cardiac myocyte dimensions in rats, hamsters, and guinea pigs

Discussion

Member takes

Implication

Key Points

PICO

Main Result

Cite This Study

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