References of "Amory, Hélène"
     in
Bookmark and Share    
Peer Reviewed
See detailEffects of Growth on Functional and Morphological Echocardiographic Variables in Friesian Calves
Amory, Hélène ULg; Lekeux, Pierre ULg

in Veterinary Record : Journal of the British Veterinary Association (1991), 128(15), 349-54

For echocardiography to become a reliable tool for the diagnosis, monitoring and prognosis of cardiac diseases in cattle, it is necessary to determine normal values of echocardiographic variables and ... [more ▼]

For echocardiography to become a reliable tool for the diagnosis, monitoring and prognosis of cardiac diseases in cattle, it is necessary to determine normal values of echocardiographic variables and their changes during the growth of healthy animals. In this study, 53 echocardiographic protocols were collected from 17 healthy Friesian calves during their period of growth. The protocol consisted of the measurement or calculation of 10 dimensional and six functional variables from M-mode long axis views of the heart. The relationships between these variables and age, body-weight and body surface area were analysed. Most of the dimensional parameters increased significantly with body size and were best predicted by an allometric regression. However, the functional indices did not change with growth, and the normal values obtained in this study may be applied to calves of any body weight. [less ▲]

Detailed reference viewed: 6 (1 ULg)
Peer Reviewed
See detailQuantitative M-Mode and Two-Dimensional Echocardiography in Calves
Amory, Hélène ULg; Jakovljevic, S.; Lekeux, Pierre ULg

in Veterinary Record : Journal of the British Veterinary Association (1991), 128(2), 25-31

A standardised echocardiographic protocol was applied to 18 healthy calves for the estimation of 51 anatomical and functional cardiac variables. These variables were measured in a long axis and a short ... [more ▼]

A standardised echocardiographic protocol was applied to 18 healthy calves for the estimation of 51 anatomical and functional cardiac variables. These variables were measured in a long axis and a short axis view of the heart, and both two-dimensional and cursor-directed time-motion (M-) modes were used. The repeatability of each of the measurements was estimated by comparing values obtained twice within 24 hours, and most of the 51 variables showed a high degree of repeatability. Statistical analysis revealed a close correlation between cardiac measurements taken post mortem and by in vivo echocardiography, and between the echocardiographic values obtained in different scanning planes of the heart or ultrasonic modes, indicating that quantitative echocardiography is a reliable technique in calves. [less ▲]

Detailed reference viewed: 22 (4 ULg)
See detailEffect of 5 different types of exercise, transportation and ACTH administration on plasma cortisol concentration in sports horses.
Linden, Annick ULg; Art, Tatiana ULg; Amory, Hélène ULg et al

in Persson, S. G. B.; Jeffcott, L. B.; Lindholm, A. (Eds.) Equine Exercise Physiology III (1991)

This study was carried out to compare the changes in plasma cortisol concentration produced by 5 different types of exercise, transportation and ACTH administration. Venous blood was analysed for cortisol ... [more ▼]

This study was carried out to compare the changes in plasma cortisol concentration produced by 5 different types of exercise, transportation and ACTH administration. Venous blood was analysed for cortisol concentration before and after each stimulus. The types of exercise were show jumping (n=28), cross country phase of a three-day event (n=32), trot race (n=9), gallop race (n = 10) and endurance ride (n=8). The response following the intravenous injection of synthetic ACTH (200 µg) in 6 of the event horses was determined. The ACTH test was carried out one week after competition. In 5 horses, the response to road transport of one hour was studied. All stimuli, except transportation produced a significant increase in plasma cortisol concentration. The endurance ride produced the largest increase and the show jumping the smallest. ACTH administration resulted in a 164% rire in plasma cortisol. Il was concluded that I) the degree of increase in plasma cortisol concentration appeared to reflect both intensity and dotation of workload; endurance ride appeared to be the most exhaustive and show jumping the least; 2) there was a correlation (r2=0.82) between the individual cortisol response to cross country exercise and to exogenous ACTH in the saure horses and 3) there was an important individual effect on transport-induced cortisol changes. [less ▲]

Detailed reference viewed: 176 (11 ULg)
See detailInhibition of serotonin-induced pulmonary alterations in calves by a selective S2 serotonergic antagonist
Linden, Annick ULg; Desmecht, Daniel ULg; Amory, Hélène ULg et al

in Archives Internationales de Physiologie et de Biochimie (1991)

Detailed reference viewed: 3 (0 ULg)
Peer Reviewed
See detailAssessment of the ventilatory response to CO2 in two breeds of calves
Rollin, Frédéric ULg; Desmecht, Daniel ULg; Linden, Annick ULg et al

in Proceedings of the 10th Comparative Respiratory Society Meeting (1991)

Detailed reference viewed: 4 (0 ULg)
Peer Reviewed
See detailComparison of 5-hydroxytryptamine concentration in the lungs of healthy and pneumonic calves
Linden, Annick ULg; Desmecht, Daniel ULg; Amory, Hélène ULg et al

in Proceedings of the 10th Comparative Respiratory Society Meeting (1991)

Detailed reference viewed: 3 (0 ULg)
Peer Reviewed
See detailImpaired diaphragmatic function in the pneumonic calf
Desmecht, Daniel ULg; Linden, Annick ULg; Amory, Hélène ULg et al

in Proceedings of the 10th Comparative Respiratory Society Meeting (1991)

Detailed reference viewed: 1 (0 ULg)
See detailChanges in leucocyte counts related to adrenocortical function in horses during exercise
Linden, Annick ULg; Art, Tatiana ULg; Amory, Hélène ULg et al

in Archives Internationales de Physiologie et de Biochimie (1991)

Detailed reference viewed: 3 (0 ULg)
See detailComparison of the effects of a physiological and a pharmacological stress on plasma cortisol in sport horses
Linden, Annick ULg; Art, Tatiana ULg; Amory, Hélène ULg et al

in Archives Internationales de Physiologie et de Biochimie (1991)

Detailed reference viewed: 8 (3 ULg)
See detailExercise physiology in jumping horses
Art, Tatiana ULg; Amory, Hélène ULg; Desmecht, Daniel ULg et al

in Archives Internationales de Physiologie et de Biochimie (1991)

Detailed reference viewed: 4 (0 ULg)
See detailEvaluation of the exercise performed by horses during the country phase of a three-day events competition : a field study
Amory, Hélène ULg; Linden, Annick ULg; Art, Tatiana ULg et al

in Archives Internationales de Physiologie et de Biochimie (1991)

Detailed reference viewed: 5 (0 ULg)
See detailEchocardiographic reference values of cardiac dimensions and function in the healthy growing Friesian calf
Amory, Hélène ULg; Genicot, B; Linden, Annick ULg et al

in Archives Internationales de Physiologie et de Biochimie (1991)

Detailed reference viewed: 9 (0 ULg)
See detailCardiac output measurement by thermodilution in the conscious calf : a technical study
Amory, Hélène ULg; Desmecht, Daniel ULg; Linden, Annick ULg et al

in Archives Internationales de Physiologie et de Biochimie (1991)

Detailed reference viewed: 4 (0 ULg)
See detailComparative echocardiography in calves of double-muscled and of standard conformation
Amory, Hélène ULg; Lekeux, Pierre ULg

in Pflügers Archives - European journal of Physiology (1991)

Detailed reference viewed: 5 (0 ULg)
See detailHeart rate, hematological and serum biochemical responses to show jumping
Lekeux, Pierre ULg; Art, Tatiana ULg; Linden, Annick ULg et al

in Persson, S. G. B.; Lindholm, A.; Jeffcott, L. B. (Eds.) Equine Exercise Physiology III (1991)

Changes in heart rate (HR), plasma lactate (LA) and some other blood parameters were studied in 16 healthy show jumping horses participating in the Belgian Junior Championship. Venous blond was collected ... [more ▼]

Changes in heart rate (HR), plasma lactate (LA) and some other blood parameters were studied in 16 healthy show jumping horses participating in the Belgian Junior Championship. Venous blond was collected from each horse before and immediately after competing and was analysed for packed cell volume (PCV), LA, plasma cortisol, blood glucose (GLU), total plasma protein bicarbonate ions and serum levels of lactate dehydrogenase, creatine kinase, aspartate aminotransferase and gamma glutamyl transferase (GGT). A HR recorder placed under the saddle continuously recorded HR from the warm-up tu 5 min after the course in 10 horses. Show jumping induced a significant increase in all parameters, except GLU, which decreased significantly, and GGT which remained unchanged. Resting values of LA and HR were 0.43±0.05 mmol I-1 and 44.7±2.9 beau min-1 respectively. Post-exercise LA reached a mean value of 8.7±0.5 mmol I-1, while HR rose to a peak of 189.2±3.5 beau min-1 during Ihe course. The results of the present study demonstrated that, although the speed and duration of such an exercise are low, show jumping represents severe exertion which requires some anaerobic metabolism. [less ▲]

Detailed reference viewed: 131 (14 ULg)
Full Text
Peer Reviewed
See detailHeliox-induced changes in the breathing mechanics of ponies during exercise.
Art, Tatiana ULg; Desmecht, Daniel ULg; Amory, Hélène ULg et al

in Equine Exercise Physiology (1991), 3

The changes occurring in breathing mechanics of exercising ponies when heliox is substituted for air are reported. Respiratory airflow, tidal volume (VT) and transpulmonary pressure (Ptp) were ... [more ▼]

The changes occurring in breathing mechanics of exercising ponies when heliox is substituted for air are reported. Respiratory airflow, tidal volume (VT) and transpulmonary pressure (Ptp) were simultaneously measured in 5 healthy ponies (255 ± 15 kg) at rest (breathing air) and while they exercised for 6 min on a treadmill. During exercise they first breathed air (2 min), than heliox (2 min) and then air again (2 min). Tidal volume (VT), respiratory rate (fR), minute volume (VE), maximum Ptp changes, total pulmonary resistance (RJ, mechanical work of Breathing per liter (Wrm l'), mechanical work per min (Wrm), dynamic compliance and pulmonary inertance were calculated. Heliox breathing significantly increased f,, and VE while VT remained unchanged. RL was reduced by 50% of lis "air value", Wrm I-' decreased, while Wrm remained unchanged. Pulmonary inertance dropped to 30% of its "air value". These observations suggest that in ponies, turbulent resistance and pulmonary inertance could be mainly responsible for the increases of RL and Wrm 1' during exercise [less ▲]

Detailed reference viewed: 75 (2 ULg)
Full Text
Peer Reviewed
See detailValidation of the Thermodilution Technique for the Estimation of the Cardiac Output in the Unsedated Calf
Amory, Hélène ULg; Linden, Annick ULg; Desmecht, Daniel ULg et al

in Journal of Veterinary Medicine. A, Physiology, Pathology, Clinical Medicine (1991), 38(6), 409-417

The purpose of this study was to establish a standardized protocol in order to obtain accurate and reproducible cardiac output (CO) measurements by the thermodilution technique in the unsedated calf. In 5 ... [more ▼]

The purpose of this study was to establish a standardized protocol in order to obtain accurate and reproducible cardiac output (CO) measurements by the thermodilution technique in the unsedated calf. In 5 healthy calves, the effect of various temperatures, volumes, rates, means and sites of injection of the thermal indicator were tested for their effect on accuracy and reproducibility of CO measurement by the thermodilution technique, the Fick method being used as the standard technique. Five milliliters of an iced 5% dextrose solution per 100 kg body weight constituted the correct amount of thermal indicator. Manual injection of the indicator bolus and/or injection of this bolus through the proximal lumen of a thermodilution Swan-Ganz catheter gave poor results of CO measurements by the thermodilution technique. On the other hand, results of CO measurements were highly reliable when the bolus injection was performed by an ECG-synchronized injection pump and/or through a right atrial catheter with a larger diameter and a shorter length than the classical Swan-Ganz catheter. It was concluded that an iced 5% solution of dextrose (5 ml/100 kg body weight) injected through a right atrial catheter by an ECG-synchronized pump gives the most accurate and reproducible CO measurements by the thermodilution technique in unsedated calves. [less ▲]

Detailed reference viewed: 47 (5 ULg)
Full Text
Peer Reviewed
See detailLobeline-Induced Hyperpnea in Equids. Comparison with Rebreathing Bag and Exercise
Art, Tatiana ULg; Desmecht, Daniel ULg; Amory, Hélène ULg et al

in Journal of Veterinary Medicine. A, Physiology, Pathology, Clinical Medicine (1991), 38(2), 148-152

In order to facilitate lung auscultation, a transitory hyperpnea may be obtained by lobeline administration, use of a rebreathing bag or exercise. The effect of these three methods on the pulmonary ... [more ▼]

In order to facilitate lung auscultation, a transitory hyperpnea may be obtained by lobeline administration, use of a rebreathing bag or exercise. The effect of these three methods on the pulmonary function were studied and compared in 5 healthy ponies. Respiratory airflow and tidal volume were measured with a pneumotachograph Nr. 5 and pleural pressure with the esophageal balloon catheter technique. Pulmonary function values were measured before, during and after the hyperpnea induced by (i) lobeline, (ii) rebreathing and (iii) exercise. Lobeline administration induced an hyperpnea due to both an increase in tidal volume and respiratory rate; this increase in ventilation lasted for about 90 s and was accompanied by a sharp rise in the respiratory peak airflows, especially the expiratory ones. The rebreathing method induced a less hyperpnea which lasted only 30 s. Lastly the hyperpnea after a light treadmill exercise was the longer in duration and intermediate between the preceding methods in intensity [less ▲]

Detailed reference viewed: 46 (5 ULg)
Full Text
See detailCharacterization of the physiological work by measurement of plasma cortisol values in horses competing in 5 different sports disciplines
Linden, Annick ULg; Massart-Leen, M.; Art, Tatiana ULg et al

in Archives Internationales de Physiologie et de Biochimie (1990, February)

Detailed reference viewed: 18 (4 ULg)