References of "Al Haidar, Ali"
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See detailL’insuffisance mitrale chez le cheval : revue de la littérature et comparaison avec la pathologie chez l’homme et chez le chien
Al Haidar, Ali; Leroux, Aurélia ULg; Amory, Hélène ULg

in Annales de Médecine Vétérinaire (2013), 157(1), 52-68

Abstract Mitral regurgitation (MR) is a one of the most common cardiac disease in the equine species. Furthermore, it is the valvular disease that presents the higher risk to be associated with reduced ... [more ▼]

Abstract Mitral regurgitation (MR) is a one of the most common cardiac disease in the equine species. Furthermore, it is the valvular disease that presents the higher risk to be associated with reduced athletic performance, to evolve into congestive heart failure and to become life threatening. The clinical diagnosis of MR depends mainly on the expertise of the veterinarian in cardiology and is above all based on cardiac auscultation. In all of the cases, the definitive diagnosis and the evaluation of the disease severity require performing a Doppler echocardiographic examination. Signs of left ventricular and/or left atrial overload, large regurgitation jet, pulmonary arterial hypertension or significant arrhythmias are negative prognosis factors. Clinical signs of congestive heart failure make the prognosis worse. Other echocardiographic parameters are used in human and dogs in order to determine the severity of the MR, but have been not validated in horses. Treatment of mitral regurgitation in the equine species is symptomatic and directed against the development of a congestive heart failure. A lot of drugs that are used in human or dogs are of limited value in horses for financial reasons and/or lack of pharmacokinetics and pharmacologic data in equine species. [less ▲]

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See detailRelationship between echocardiographic measurements and body size in horses.
Al Haidar, Ali; Leroux, Aurélia ULg; Borde, Laura ULg et al

in Journal of Equine Veterinary Science (2013), 33(2), 107-114

The objectives of this work were to evaluate the optimal body size variable, and to determine mathematical model that best fits echocardiographic measurements to body size in the equine species. 150 ... [more ▼]

The objectives of this work were to evaluate the optimal body size variable, and to determine mathematical model that best fits echocardiographic measurements to body size in the equine species. 150 horses of various breeds, aged 1 week to 17 years old, body weight (BW) 38 to 890 kg, and free from cardiac disease were used in this study. Based on their age (i.e. younger or older than 2 years), animals were separated into 2 groups. In each horse, the body weight (BW), height at withers (HT), thoracic circumference (TC) and the body length (BL) were measured, the body surface area (BSA) was calculated, and a standard two-dimensional and M-mode echocardiography was performed allowing classic cardiac measurements to be taken. Correlations between each echocardiographic measurement and each of the anthropometric variables were assessed via a Pearson’s product-moment analysis and using linear, logarithmic, and power regression analysis in all animals and within the 2 groups. The dimensional, but not the functional, echocardiographic measurements showed a close correlation with all body size variables, especially during growth. The relationship between cardiac measurements and body size was best described using power regression models with TC as the anthropometric variable, but the relationship was also very accurately described using BW, BSA, or BL. In the equine species, dimensional echocardiographic reference values should be established using power regression equations on TC. Such a correction for body size could increase the diagnostic value of echocardiography in equine cardiology. [less ▲]

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See detailEffect of breed, sex, age and body weight on Echocardiographic Measurements in the Equine Species
Al Haidar, Ali; Farnir, Frédéric ULg; Deleuze, Stefan ULg et al

in Research in Veterinary Science (2013), In press

Little is known about the effect of various animal's signalment variables on echocardiographic reference values in the equine species. This study was performed to evaluate the effect of sex, breed, age ... [more ▼]

Little is known about the effect of various animal's signalment variables on echocardiographic reference values in the equine species. This study was performed to evaluate the effect of sex, breed, age and body weight (BW) on echocardiographic measurements in the equine species. Echocardiography was performed on 212 ponies or horses of various breeds, aged from 1 day to 37 years old (mean ± SD: 7.8 ± 5.8 years), BW 38-890 kg (mean ± SD: 421 ± 133 Kg), and free of cardiac disease. Fifty of those animals aged from 2 months to 35 years old (mean ± SD: 11.6 ± 6.4 years old); BW 77-662 kg (mean ± SD: 436 ± 135 kg) were also examined using the pulsed-wave Doppler mode. Standard two-dimensional and M-mode echocardiography were performed on all animals. Standard pulsed-wave Doppler examination of each cardiac valve was performed on the 50 first examined animals. Data were analysed using a general linear model including the effect of sex, age, breed and BW after logarithmic transformation of the data. Therefore, the same analysis was performed separately on animals aged  2 years-old and on older animals. All dimensional echocardiographic measurements were significantly affected by BW and most of them were significantly affected by breed, but not by sex. Only the aortic and the pulmonary artery internal diameter were significantly affected by age. None of the Doppler measurements were significantly affected by the tested variables. In conclusion, in the equine species, dimensional echocardiographic reference values should be established using regression equations as a function of BW, which could increase the diagnostic value of this leading technique in equine cardiology. Breed could also have an effect on those measurements. [less ▲]

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See detailAltered diastolic and systolic left ventricular function in horses completing a long distance endurance race.
Amory, Hélène ULg; Votion, Dominique ULg; Fraipont, Audrey ULg et al

in In Proccedings of the First Benelux Congress of Physiology and Pharmacology (PHYSPHAR) (2011, March 18)

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See detailComparison of the Repeatability of Echocardiographic Measurements from Different Modes and Views in Horses of Various Breeds and Sizes
Al Haidar, Ali; Farnir, Frédéric ULg; Deleuze, Stefan ULg et al

in Journal of Equine Veterinary Science (2010), 30(6), 287-297

The objective of this study was to compare the repeatability of echocardiographic measurements obtained from different echocardiographic modes and views in healthy adult equids of various sizes, breeds ... [more ▼]

The objective of this study was to compare the repeatability of echocardiographic measurements obtained from different echocardiographic modes and views in healthy adult equids of various sizes, breeds and thorax shapes. Ten, free of cardiac disease, equids (body weight: 120 to 662 kg; age: 1 to 26 years) from various breeds were used in this study. Each animal was submitted to a standardized echocardiographic and Doppler protocol 3 times at 1 day interval. This protocol included the measurements of left and right ventricular, aortic, pulmonary, and left atrial parameters obtained from different views using the bidimensional (2D) or the motion (M) modes, and the measurement of several parameters of blood flow obtained from the pulsed wave Doppler mode. Repeatability of each measurement was estimated on the basis of the residual variance using a linear model and the coefficient of variation of repeated measurements. A two by two comparison of the repeatability of measurements performed in different views was performed using the residual variances in a variance ratio F test. Results showed that repeatability of echocardiographic or Doppler measurements in equids of various sizes, breeds and thorax shapes are comparable to previously reported results in thoroughbred and standardbred horses. Left ventricular morphologic parameters showed a good repeatability in the classic M-mode right parasternal short axis (Sax) view at the level of the chordae tendinae, but the 2D-mode right parasternal long axis (LAx) four- chambers view appeared to offer an interesting alternative to measure them. This latter view also allowed obtaining the mostre repeatable measurement of right ventricular internal diameter. The left atrial diameter was maximal and most repeatable in the 2D-mode left parasternal long axisLAx four- chambers angled view, and the repeatability of the aortic diameter was best in the 2D-mode right parasternal long axisLAx five-chambers view. Finally, aortic systolic time intervals were more repeatable when measured from the Doppler mode as compared to the M-mode. ThusIn conclusion, best repeatability of echocardiographic measurements in horses could be optimized following an echocardiographicthe following protocol in equids: 1-M-mode right parasternal short axis view at the level of chordae tendinae, to measure left ventricular morphologic parameters, and 2D-mode right parasternal long axis four-chamber as an alternative view. 2-2D-mode right parasternal long axis five-chambersre, to measure the aortic diameter. 3-2D-mode left parasternal long axis four-chambersre angled view, to measure the left atrial diameter. [less ▲]

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