Skeletal muscularity and heart function in growing piglets.
Nine female piglets (about 15 kg), originating from a line with a low skeletal muscularity, were compared to 9 female piglets (about 15 kg) originating from a line with a high skeletal muscularity. Electrocardiogram-parameters (frequency rise, ST-elevation, heart rate expressed as mean values per h) were measured for 17 h with an ambulatory Holter-device. Dimensions of longissimus dorsi muscle (depth, circumference, surface, speed of ultrasound) were measured with an ultrasound device based on the pulse echo principle. Parameters, with respect to muscular dimensions, were statistically significant, differing between both lines, whereas, only the ST-elevation was significant, lower in the high skeletal muscularity line. The lower muscular depth was, the higher the ST-elevation and the higher the mean lowest heart rate were, and the lower the speed of ultrasound through the muscle tissue, by the higher the mean frequency rise. Hence, in growing piglets of about 15 kg, an impairment of heart function coincides gradually with a proportional higher development of skeletal muscularity.
Labo Agrarische Bouwkunde, Heverlee, Belgium.
R
R
Geers
G
G
Parduyns
V
V
Goedseels
L
L
Bosschaerts
J
J
De Ley
D000818:Animals; D001835:Body Weight; D004562:Electrocardiography / Q000662:veterinary; D005260:Female; D006321:Heart / Q000502:physiology*; D006339:Heart Rate; D009132:Muscles / Q000033:anatomy & histology*; D013552:Swine / Q000033:anatomy & histology / Q000502:physiology*; D014463:Ultrasonography