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Cardiac function and morphology of Hanford miniature swine and Yucatan miniature and micro swine



Cardiac function and morphology of Hanford miniature swine and Yucatan miniature and micro swine



Laboratory Animal Science 40(1): 47-50



The use of miniature swine in biomedical research is increasing; however, a comparison of cardiac function and morphology between strains has yet to be characterized. The purpose of this project was to examine comprehensive hemodynamics and cardiac morphology of three groups of ten normal, 4 months old, age-matched Yucatan miniature (MINI) pigs, Yucatan micropigs (MICRO) and Hanford (HAN) miniature pigs, 5 males and five females per group. Closed chest cardiac catheterization under equivalent conditions was performed followed by post mortem cardiac morphometry. Mean arterial pressure was significantly greater in the Hanford group when compared to both the minipig and micropig pigs (HAN: 89 .+-. 4; MINI: 48 .+-. 3; MICRO: 53 .+-. 2 mmHg). Pulmonary vascular resistance was significantly different between the three groups (HAN: 9 .+-. 1; MINI: 60 .+-. 12; MICRO: 111 .+-. 29 dyne .times. sec/cm .times. m2). The Hanford strain had a significantly smaller heart weight to body weight ratio than the other two groups (HAN: 4.6 .+-. 1.0; MINI: 5.7 .+-. 0.1; MICRO: 5.5 .+-. 1.0). Variations in cardiovascular parameters occur among these strains and should be considered when constructing experimental designs.

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Accession: 007080605

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PMID: 2153859


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