References of "Art, Tatiana"
     in
Bookmark and Share    
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: 4 (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: 48 (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: 30 (2 ULg)
Full Text
Peer Reviewed
See detailPhysiologie de l'effort et médecine sportive équine
Art, Tatiana ULg; Lekeux, Pierre ULg

in Pratique Vétérinaire Equine (1991), 23(2), 5-14

Detailed reference viewed: 20 (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: 34 (5 ULg)
Full Text
Peer Reviewed
See detailMechanical Properties of the Isolated Equine Trachea
Art, Tatiana ULg; Lekeux, Pierre ULg

in Research in Veterinary Science (1991), 51(1), 55-60

In order to study the in vitro mechanical properties of the equine trachea submitted to the compressive pressures observed in vivo, the pressure-volume relationship was determined in intra- and extra ... [more ▼]

In order to study the in vitro mechanical properties of the equine trachea submitted to the compressive pressures observed in vivo, the pressure-volume relationship was determined in intra- and extra-thoracic tracheal segments taken post mortem from 29 healthy horses (one to 15 years old; 352 to 651 kg). At the same time, the cross-sectional lumen area (X-SA) at the mid-point of the segment was measured using a slit-lamp transillumination and photographic measurement by endoscopy. The tracheal specific compliance (Cs) as well as the relative changes in X-SA and in the sagittal and transverse diameters, for intraluminal pressures from 5 to - 5 kPa, were calculated. The extrathoracic tracheal Cs was 0.060 +/- 0.002 kPa-1 and, at an intraluminal pressure of - 5 kPa, X-SA was reduced to about 73 per cent of its resting value. The intrathoracic segments were more compliant and, at similar compressive pressure, their X-SA was more reduced. These data show that the equine tracheal compliance is high and suggest that the increase in pulmonary resistance observed during strenuous exercise may be partly explained by a partial tracheal collapse. [less ▲]

Detailed reference viewed: 20 (1 ULg)
Full Text
Peer Reviewed
See detailThe Effect of Shape, Age and Extension on the Compliance of Equine Tracheal Segments
Art, Tatiana ULg; Lekeux, Pierre ULg

in Veterinary Research Communications (1991), 15(2), 135-146

The influence of the age and weight of the animal as well as that of the extension and the shape of the trachea on the mechanical properties of the cervical trachea was studied in 33 isolated tracheal ... [more ▼]

The influence of the age and weight of the animal as well as that of the extension and the shape of the trachea on the mechanical properties of the cervical trachea was studied in 33 isolated tracheal segments obtained from freshly slaughtered horses. The relationship between intraluminal pressure and volume was determined in the cervical tracheal segments positioned firstly under normal longitudinal tension and secondly in hyperextension. At the same time, changes in the area of the cross-section of the lumen (X-SA) at the midpoint of the segment were measured using photographs obtained by slit-lamp transillumination and endoscopy. The sagittal (DS) and transverse (DT) diameters were determined for each segment and the DT/DS ratio was calculated to give an estimate of the shape of the X-SA. The results showed that (i) neither the age nor the weight of the horses had any influence on the mechanical properties of the trachea; (ii) extension decreases the compressibility of the tracheal segment in vitro; (iii) there is a wide variation in the extrathoracic tracheal X-SA shape in horses; and (iv) the shape of the X-SA has a major influence on the mechanical properties of the trachea. It was concluded that (i) hyperextension of the neck will partly facilitate respiration at high levels of ventilation by elongating the trachea and by decreasing its collapsibility; and (ii) the tracheal collapse which may occur during high levels of ventilation will be more or less important depending on the individual X-SA shape. [less ▲]

Detailed reference viewed: 15 (1 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)
Full Text
Peer Reviewed
See detailRespiratory-Induced Variability of Pulmonary Arterial Pressure Measurements in Cattle
Amory, Hélène ULg; Art, Tatiana ULg; Desmecht, Daniel ULg et al

in Veterinary Research Communications (1990), 14(3), 227-33

The purpose of this study was to investigate the variability of the peak systolic (PAPs) and the end diastolic (PAPd) pulmonary arterial pressures induced by intrapleural pressure changes in cattle. The ... [more ▼]

The purpose of this study was to investigate the variability of the peak systolic (PAPs) and the end diastolic (PAPd) pulmonary arterial pressures induced by intrapleural pressure changes in cattle. The pleural pressure (Ppl), the electrocardiogram and the pulmonary arterial pressure (PAP) were simultaneously recorded in five healthy calves under three different conditions, i.e. normoxia (N), normoxia with an added airflow resistance (R) and hypoxia (H). PAPs, PAPd and their corresponding transmural pressures were measured and averaged over 10 successive regular cardiac cycles. The maximum Ppl changes (max delta Ppl) were measured on the same tracings. The variance and coefficients of variation were calculated for each set of vascular measurements. Max delta Ppl was significantly increased with regard to N values during R and H conditions. This increase in max delta Ppl induced a simultaneous rise in the variability of PAP measurements, while in each condition, this variability was greatly lowered by use of the corresponding transmural pressure. It was concluded that, in calves with high max delta Ppl, the influence of respiration on PAP becomes considerable. In such cases, the use of transmural pressures rather than luminal pressures can greatly reduce the variability of these pulmonary pressure measurements and therefore increase their sensitivity. [less ▲]

Detailed reference viewed: 21 (4 ULg)
Full Text
Peer Reviewed
See detailMechanics of breathing during strenuous exercise in Thoroughbred horses
Art, Tatiana ULg; Anderson, L.; Woakes, A. J. et al

in Respiration Physiology (1990), 82(3), 279-294

The changes induced by exercise on the mechanics of breathing, as well as the simultaneous changes occurring in arterial blood gas tensions and in respiratory gas exchange were investigated in 6 healthy ... [more ▼]

The changes induced by exercise on the mechanics of breathing, as well as the simultaneous changes occurring in arterial blood gas tensions and in respiratory gas exchange were investigated in 6 healthy thoroughbred horses, performing a treadmill exercise of increasing intensity. Respiratory airflow and tidal volume (VT) were measured with ultrasonic flowmeters. Pleural pressure changes were measured by an oesophageal balloon catheter. Gas concentration of the expired air was analysed with a mass spectrometer; the oxygen consumption (VO2) and the carbon dioxide output (VCO2) were computed breath-by-breath. Arterial blood gas values were obtained by sampling from the carotid artery. Between rest and fast gallop VT, respiratory frequency, expired minute ventilation (VE), VO2, VCO2, total pulmonary resistance (RL), mechanical work of breathing (Wrm) and PaCO2 increased significantly while PaO2 decreased significantly. The Wrm.VO2(-1) ratio in galloping horses increased exponentially with VE. This, together with the relationship between the changes in PaO2 and in PaCO2 and the increase in the ventilatory mechanics parameters, suggests that the mechanics of breathing may be one of the factors constraining further increase in ventilation in exercising healthy horses. [less ▲]

Detailed reference viewed: 90 (8 ULg)
Peer Reviewed
See detailPhysiological, pathophysiological and pharmacological studies of the mechanics of breathing in cattle
Lekeux, Pierre ULg; Amory, Hélène ULg; Art, Tatiana ULg et al

in Proceedings du Congrès National Vétérinaire Yougoslave (1990)

Detailed reference viewed: 2 (0 ULg)
Peer Reviewed
See detailLa mecanica respiratoria en terneros sanos respirando Helio-Oxigeno
Rodriguez, MN; Art, Tatiana ULg; Rollin, Frédéric ULg et al

in Proceedings of the XVIth World Buiatrics Congress (1990)

Detailed reference viewed: 5 (0 ULg)
Peer Reviewed
See detailLa mecanica respiratoria en terneros sanos respirando Helio-Oxigeno
Rodriguez, MN; Art, Tatiana ULg; Rollin, Frédéric ULg et al

in Proceedings of the XVIIIth Jordanas Uruguayas de Buiatria (1990)

Detailed reference viewed: 7 (0 ULg)
See detailEffect of gas density on ventilatory mechanics in healthy calves
Rollin, Frédéric ULg; Rodriguez, MN; Art, Tatiana ULg et al

in Archives Internationales de Physiologie et de Biochimie (1990)

Detailed reference viewed: 2 (0 ULg)
See detailPulmonary vascular response of healthy calves to intravenous and aerosol 5-hydroxytryptamine
Desmecht, Daniel ULg; Amory, Hélène ULg; Rollin, Frédéric ULg et al

in Archives Internationales de Physiologie et de Biochimie (1990)

Detailed reference viewed: 2 (0 ULg)
Peer Reviewed
See detailEtude échocardiographique de la fonction et de la morphologie cardiaque chez le veau hyperviandeux
Amory, Hélène ULg; Genicot, B; Desmecht, Daniel ULg et al

in Proceedings of the XVIth World Buiatrics Congress, (1990)

Detailed reference viewed: 3 (1 ULg)
Full Text
Peer Reviewed
See detailComparison of the adrenocortical response to both pharmacological and physiological stresses in sport horses
Linden, Annick ULg; Art, Tatiana ULg; Amory, Hélène ULg et al

in Journal of Veterinary Medicine. A, Physiology, Pathology, Clinical Medicine (1990), 37(8), 601-604

Seven sport horses were investigated to compare physiological and pharmacological stresses on the plasma glucocorticosteroid levels. <br />Venous blond was sampled and analysed for cortisol concentrations ... [more ▼]

Seven sport horses were investigated to compare physiological and pharmacological stresses on the plasma glucocorticosteroid levels. <br />Venous blond was sampled and analysed for cortisol concentrations before and after each type of stress. The physiological stress was induced by the completion of a cross-country and the phar¬macological one, by an intravenous ACTH administration (200 µg) in the came horses, one week after the course. <br />Both exercise and ACTH injection induced a highly significant cortisol increase of 79 ± 0.10 %, and 160 ± 0.18 %, respectively. The relative plasma cortisol increases due to exercise on the nue hand, and due to ACTH administration on the other hand, were correlated with a coefficient of 0.82. It was concluded that the plasma cortisol increase induced by a standardised pharmacological stress could be used in order to predict the exercise-induced stress response. [less ▲]

Detailed reference viewed: 36 (11 ULg)