Heart performance of lambs and its relation to muscle volume and body surface

Authors : Robert ROMVARI, Csaba HANCZ, Peter HORN, Zsolt PETRASI, Andras SZABO, David MEZÖSZENTGYÖRGYI, İmre REPA

Pages : 69-74

Doi:10.3906/vet-1403-92

View : 6 | Download : 6

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :Electrocardiography-gated dynamic magnetic resonance imaging insert ignore into journalissuearticles values(MRI); methodology was developed for the in vivo examination of sheep heart characteristics. By combining noninvasive determination of skeletal muscle mass, we studied the relationship between total body skeletal muscle content and heart performance. Measurements were carried out on male Merino lambs using 1.5 T field strength equipment. Average left ventricular volumes were determined and stroke volume was estimated during image postprocessing. Ejection fraction was calculated insert ignore into journalissuearticles values(73 ± 1.8%); and the cardiac output insert ignore into journalissuearticles values(CO); value was estimated insert ignore into journalissuearticles values(2.75 ± 0.16 L/min);. After measuring left ventricular wall thickness, contraction values were determined at the septum insert ignore into journalissuearticles values(62%);, anterior insert ignore into journalissuearticles values(69%);, lateral insert ignore into journalissuearticles values(54%);, and posterior insert ignore into journalissuearticles values(58%); walls. Ventricular mass was also calculated. Body composition measurement was performed immediately after MRI examination by computerized tomography insert ignore into journalissuearticles values(CT); during the same narcosis. Relative CO value was developed from the interpretation of the functional MRI and volumetric CT results, expressing the relationship between heart performance and total body skeletal muscle volume. Finally, CO value relating to body surface was estimated insert ignore into journalissuearticles values(18.3 ± 3.1 dm2/insert ignore into journalissuearticles values(L min-1);); to characterize the metabolic rate.
Keywords : Lamb, magnetic resonance imaging, computerized tomography, cardiac performance