Examination of the heart capacity of meat- and fat-type pigs by means of ECG-gated dynamic magnetic resonance imaging and computerized tomography

Petrási, Zsolt; Romvári, Róbert; Bajzik, Gábor; Romics, Imre; Horn, Peter A.

doi:10.1016/s0301-6226(03)00046-0

Cited by 9 publications

(12 citation statements)

References 14 publications

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“…However, it must be stressed that no ECGbased cardiac data for sheep in the normal physiological state are available in the literature. The available data concerning the in vivo model have arisen from medical The average 73% ejection fraction value is remarkably higher than the corresponding data of the Mangalica pig (57%), the intensive meat type pig (53%) (14), and the giant turkey (51%) (15). Lower ejection fraction refers to unfavorable hemodynamic characteristics of the heart.…”

Section: Discussionmentioning

confidence: 99%

“…In contrast, Segers et al (17) developed a purely mathematical model for the estimation of SV during strongly differing hemodynamic conditions in sheep. At maximum O 2 consumption, 87% of cardiac output supplies the skeletal muscles in miniature pigs (27 (14). This favorably low value signifies a well-balanced cardiovascular system that is characteristic of this semiintensive sheep breed.…”

Section: Discussionmentioning

confidence: 99%

“…An ovine model measured end-systolic volume after myocardial infarction using the MRI method, with and without micropump-based partial mechanical circulatory support (13). The cardiac MRI method and computerized tomography (CT) were used jointly to measure the functional heart performance of the pig and heavy turkey in connection with body tissue composition determination (14,15). In addition, real-time 3D echocardiography, as applied by Schmidt et al, may be a useful quantitative method for the determination of ovine cardiac characteristics (16).…”

Section: Introductionmentioning

confidence: 99%

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

Romvári

Hancz

Horn

et al. 2015

Turk J Vet Anim Sci

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Electrocardiography-gated dynamic magnetic resonance imaging (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 (73 ± 1.8%) and the cardiac output (CO) value was estimated (2.75 ± 0.16 L/min). After measuring left ventricular wall thickness, contraction values were determined at the septum (62%), anterior (69%), lateral (54%), and posterior (58%) walls. Ventricular mass was also calculated. Body composition measurement was performed immediately after MRI examination by computerized tomography (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 (18.3 ± 3.1 dm 2 /(L min -1 )) to characterize the metabolic rate.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

Romvári

Hancz

Horn

et al. 2015

Turk J Vet Anim Sci

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“…The cardiac output value was computed as the product of the heart rate and the stroke volume. Finally, as the joint interpretation of the functional MRI and volumetric CT examination results, the so-called 'relative cardiac output' value was also developed, expressing the relationship between heart performance and total body skeletal muscle volume (Petrási et al, 2003).…”

Section: Mri Examination and Image Processingmentioning

confidence: 99%

“…The description of the method and its application in pigs have been presented by Romvári et al (2001). When applied jointly, in vivo MRI and computerised tomography (CT) methods are suitable for simultaneous measurement of functional heart capacity and body tissue composition of the live animal (Petrási et al, 2003). Similar studies were done on heavy-type turkeys by Romvári et al (2004).…”

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confidence: 99%

Cross-sectional imaging assisted selection for heart performance in pigs

Romvári

Szabó

Andrássy

et al. 2008

Acta Veterinaria Hungarica

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A two-way selection procedure was performed on a Landrace pig line. First the cardiac output (CO) values (6.89 ± 1.27 L/min) were estimated by ECGgated magnetic resonance imaging (MRI) to quantify the heart performance of the boars (n = 30), then total body skeletal muscle volume (MVTB; 48.7 ± 5.17 dm³) was determined applying spiral computerised tomography (CT). The relative cardiac output value (RCO) was developed, expressing the relationship between CO and MVTB. Four superior [RCO value below 6.7 dm 3 / (L * min ), n = 7 and 23], respectively. Comparing the existing five progeny groups, all of the 'HP+' groups differed significantly from the 'HP-' one, where the largest heart performance contrast found was 3.2 dm 3 / (L * min -1 ). Based upon the results, the selection is being continued on a larger population.

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