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Beckers L, Baeten P, Popescu V, Swinnen D, Cardilli A, Hamad I, Van Wijmeersch B, Tavernier SJ, Kleinewietfeld M, Broux B, Fraussen J, Somers V. Alterations in the innate and adaptive immune system in a real-world cohort of multiple sclerosis patients treated with ocrelizumab. Clin Immunol 2024; 259:109894. [PMID: 38185268 DOI: 10.1016/j.clim.2024.109894] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Revised: 12/22/2023] [Accepted: 01/03/2024] [Indexed: 01/09/2024]
Abstract
B cell depletion by the anti-CD20 antibody ocrelizumab is effective in relapsing-remitting (RR) and primary progressive (PP) multiple sclerosis (MS). We investigated immunological changes in peripheral blood of a real-world MS cohort after 6 and 12 months of ocrelizumab. All RRMS and most PPMS patients (15/20) showed treatment response. Ocrelizumab not only reduced CD20+ B cells, but also numbers of CD20+ T cells. Absolute numbers of monocytes, dendritic cells and CD8+ T cells were increased, while CD56hi natural killer cells were reduced after ocrelizumab. The residual B cell population shifted towards transitional and activated, IgA+ switched memory B cells, double negative B cells, and antibody-secreting cells. Delaying the treatment interval by 2-3 months increased mean B cell frequencies and enhanced naive B cell repopulation. Ocrelizumab reduced plasma levels of interleukin(IL)-12p70 and interferon(IFN)-α2. These findings will contribute to understanding ineffective treatment responses, dealing with life-threatening infections and further unravelling MS pathogenesis.
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Affiliation(s)
- L Beckers
- University MS Center (UMSC), Hasselt-Pelt, Hasselt, Belgium; Department of Immunology and Infection, Biomedical Research Institute, Hasselt University, Hasselt, Belgium
| | - P Baeten
- University MS Center (UMSC), Hasselt-Pelt, Hasselt, Belgium; Department of Immunology and Infection, Biomedical Research Institute, Hasselt University, Hasselt, Belgium
| | - V Popescu
- University MS Center (UMSC), Hasselt-Pelt, Hasselt, Belgium; Department of Immunology and Infection, Biomedical Research Institute, Hasselt University, Hasselt, Belgium; Noorderhart, Rehabilitation and MS Center, Pelt, Belgium
| | - D Swinnen
- University MS Center (UMSC), Hasselt-Pelt, Hasselt, Belgium; Department of Immunology and Infection, Biomedical Research Institute, Hasselt University, Hasselt, Belgium; VIB Laboratory of Translational Immunomodulation, Center for Inflammation Research (IRC), Diepenbeek, Belgium
| | - A Cardilli
- University MS Center (UMSC), Hasselt-Pelt, Hasselt, Belgium; Department of Immunology and Infection, Biomedical Research Institute, Hasselt University, Hasselt, Belgium; VIB Laboratory of Translational Immunomodulation, Center for Inflammation Research (IRC), Diepenbeek, Belgium
| | - I Hamad
- University MS Center (UMSC), Hasselt-Pelt, Hasselt, Belgium; Department of Immunology and Infection, Biomedical Research Institute, Hasselt University, Hasselt, Belgium; VIB Laboratory of Translational Immunomodulation, Center for Inflammation Research (IRC), Diepenbeek, Belgium
| | - B Van Wijmeersch
- University MS Center (UMSC), Hasselt-Pelt, Hasselt, Belgium; Department of Immunology and Infection, Biomedical Research Institute, Hasselt University, Hasselt, Belgium; Noorderhart, Rehabilitation and MS Center, Pelt, Belgium
| | - S J Tavernier
- Department of Internal Medicine and Pediatrics, Ghent University, Ghent, Belgium; Unit of Molecular Signal Transduction in Inflammation, VIB-UGent Center for Inflammation Research (IRC), Ghent, Belgium
| | - M Kleinewietfeld
- University MS Center (UMSC), Hasselt-Pelt, Hasselt, Belgium; Department of Immunology and Infection, Biomedical Research Institute, Hasselt University, Hasselt, Belgium; VIB Laboratory of Translational Immunomodulation, Center for Inflammation Research (IRC), Diepenbeek, Belgium
| | - B Broux
- University MS Center (UMSC), Hasselt-Pelt, Hasselt, Belgium; Department of Immunology and Infection, Biomedical Research Institute, Hasselt University, Hasselt, Belgium
| | - J Fraussen
- University MS Center (UMSC), Hasselt-Pelt, Hasselt, Belgium; Department of Immunology and Infection, Biomedical Research Institute, Hasselt University, Hasselt, Belgium
| | - V Somers
- University MS Center (UMSC), Hasselt-Pelt, Hasselt, Belgium; Department of Immunology and Infection, Biomedical Research Institute, Hasselt University, Hasselt, Belgium.
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Kaes J, Hoeks C, Sacreas A, Van Herck A, Heigl T, Vanstapel A, Verleden S, Aelbrecht C, Ordies S, Neyrinck A, Ceulemans L, Van Raemdonck D, Verleden G, Vos R, Broux B, Vanaudenaerde B. Circulating Follicular Helper T Cells are Decreased in Chronic Lung Allograft Dysfunction. J Heart Lung Transplant 2020. [DOI: 10.1016/j.healun.2020.01.682] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
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Broux B, De Clercq D, Vera L, Ven S, Deprez P, Decloedt A, van Loon G. Can heart rate variability parameters derived by a heart rate monitor differentiate between atrial fibrillation and sinus rhythm? BMC Vet Res 2018; 14:320. [PMID: 30359273 PMCID: PMC6203204 DOI: 10.1186/s12917-018-1650-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Accepted: 10/16/2018] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Heart rate variability (HRV) parameters, and especially RMSSD (root mean squared successive differences in RR interval), could distinguish atrial fibrillation (AF) from sinus rhythm(SR) in horses, as was demonstrated in a previous study. If heart rate monitors (HRM) automatically calculating RMSSD could also distinguish AF from SR, they would be useful for the monitoring of AF recurrence. The objective of the study was to assess whether RMSSD values obtained from a HRM can differentiate AF from SR in horses. Furthermore, the impact of artifact correction algorithms, integrated in the analyses software for HRV analyses was evaluated. Fourteen horses presented for AF treatment were simultaneously equipped with a HRM and an electrocardiogram (ECG). A two-minute recording at rest, walk and trot, before and after cardioversion, was obtained. RR intervals used were those determined automatically by the HRM and by the equine ECG analysis software, and those obtained after manual correction of QRS detection within the ECG software. RMSSD was calculated by the HRM software and by dedicated HRV software, using six different artifact filters. Statistical analysis was performed using the Wilcoxon signed-rank test and receiver operating curves. RESULTS The HRM, which applies a low level filter, produced high area under the curve (AUC) (> 0.9) and cut off values with high sensitivity and specificity. Similar results were obtained for the ECG, when low level artifact filtering was applied. When no artifact correction was used during trotting, an important decrease in AUC (0.75) occurred. CONCLUSION In horses treated for AF, HRMs with automatic RMSSD calculations distinguish between AF and SR. Such devices might be a useful aid to monitor for AF recurrence in horses.
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Affiliation(s)
- B Broux
- Equine Cardioteam, Department of Large Animal Internal Medicine, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820, Merelbeke, Belgium.
| | - D De Clercq
- Equine Cardioteam, Department of Large Animal Internal Medicine, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820, Merelbeke, Belgium
| | - L Vera
- Equine Cardioteam, Department of Large Animal Internal Medicine, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820, Merelbeke, Belgium
| | - S Ven
- Equine Cardioteam, Department of Large Animal Internal Medicine, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820, Merelbeke, Belgium
| | - P Deprez
- Equine Cardioteam, Department of Large Animal Internal Medicine, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820, Merelbeke, Belgium
| | - A Decloedt
- Equine Cardioteam, Department of Large Animal Internal Medicine, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820, Merelbeke, Belgium
| | - G van Loon
- Equine Cardioteam, Department of Large Animal Internal Medicine, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820, Merelbeke, Belgium
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Broux B, van Bergen T, Schauvliege S, Vali Y, Lefère L, Gielen I. Successful surgical debridement of a cerebral
Streptococcus equi equi
abscess by parietal bone flap craniotomy in a 2‐month‐old Warmblood foal. EQUINE VET EDUC 2018. [DOI: 10.1111/eve.12995] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- B. Broux
- Department of Large Animal Internal Medicine Ghent University Merelbeke Belgium
- Clinique Equine d'Acy‐Romance Acy‐Romance France
| | - T. van Bergen
- Clinique Equine d'Acy‐Romance Acy‐Romance France
- Department of Surgery and Anaesthesiology Ghent University Merelbeke Belgium
| | - S. Schauvliege
- Department of Surgery and Anaesthesiology Ghent University Merelbeke Belgium
| | - Y. Vali
- Department of Radiology and Surgery Faculty of Veterinary Medicine University of Tehran Tehran Iran
| | - L. Lefère
- Department of Large Animal Internal Medicine Ghent University Merelbeke Belgium
| | - I. Gielen
- Department of Medical Imaging and Small Animal Orthopaedics Faculty of Veterinary Medicine Ghent University Merelbeke Belgium
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Broux B, De Clercq D, Decloedt A, Vera L, Devreese M, Gehring R, Croubels S, van Loon G. Pharmacokinetics and electrophysiological effects of sotalol hydrochloride in horses. Equine Vet J 2017; 50:377-383. [PMID: 29023952 DOI: 10.1111/evj.12765] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2017] [Accepted: 09/22/2017] [Indexed: 11/27/2022]
Abstract
BACKGROUND Arrhythmias in horses may require long-term anti-arrhythmic therapy. Unfortunately, oral anti-arrhythmic drugs for use in horses are currently scarce. In human patients and small animals, sotalol, a β-blocker with class III anti-arrhythmic properties, is often used for long-term treatment. OBJECTIVES To determine the pharmacokinetics of sotalol at multiple oral dosages in unfasted horses, as well as the effects on electro- and echocardiographic measurements, right atrial and ventricular monophasic action potential (MAP) and effective refractory period (ERP). STUDY DESIGN Placebo controlled, double-blinded experiment. MATERIALS AND METHODS Six healthy, unfasted Warmblood horses were given either 0, 2, 3 or 4 mg/kg bodyweight (bwt) sotalol orally (PO) twice daily (bid) for 9 days in a randomised cross-over design. Echocardiography and surface electrocardiography were performed and plasma concentrations of sotalol and right atrial and right ventricular MAPs and ERPs were determined at steady-state conditions. Statistical analysis was performed using a repeated measures univariate analysis with post hoc Bonferroni corrections. RESULTS Calculated mean steady-state plasma concentrations determined by nonlinear mixed-effect modelling were 287 (range 234-339), 409 (359-458) and 543 (439-646) ng/mL for 2, 3 and 4 mg/kg bwt sotalol PO bid respectively. Sotalol significantly increased the QT interval and ERPs, but, despite increasing plasma concentrations, higher dosages did not result in a progressive increase in QT interval or ERPs. Echocardiographic and other electrocardiographic measurements did not change significantly. MAP durations at 90% repolarisation were not significantly different during sotalol treatment. Besides transient local sweating, no side effects were noted. MAIN LIMITATIONS Study size and ad libitum feeding of hay. CONCLUSIONS Sotalol at a dose of 2, 3 and 4 mg/kg bwt PO bid increases the QT interval and ERP and might be a useful drug for long-term anti-arrhythmic therapy in horses.
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Affiliation(s)
- B Broux
- Department of Large Animal Internal Medicine, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
| | - D De Clercq
- Department of Large Animal Internal Medicine, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
| | - A Decloedt
- Department of Large Animal Internal Medicine, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
| | - L Vera
- Department of Large Animal Internal Medicine, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
| | - M Devreese
- Department of Pharmacology, Toxicology and Biochemistry, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium.,Institute of Computational Comparative Medicine, College of Veterinary Medicine, Kansas State University, Manhattan, Kansas, USA
| | - R Gehring
- Institute of Computational Comparative Medicine, College of Veterinary Medicine, Kansas State University, Manhattan, Kansas, USA
| | - S Croubels
- Department of Pharmacology, Toxicology and Biochemistry, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
| | - G van Loon
- Department of Large Animal Internal Medicine, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
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Paulussen E, Broux B, van Bergen T, Lefère L, De Clercq D, van Loon G. Caecal intussusception in the horse: Ultrasonographic findings and survival to hospital discharge of 60 cases (2009-2013). EQUINE VET EDUC 2017. [DOI: 10.1111/eve.12798] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- E. Paulussen
- Department of Large Animal Internal Medicine; Faculty of Veterinary Medicine; Salisburylaan Merelbeke Belgium
| | - B. Broux
- Department of Large Animal Internal Medicine; Faculty of Veterinary Medicine; Salisburylaan Merelbeke Belgium
| | - T. van Bergen
- Department of Surgery and Anaesthesiology of Domestic Animals; Faculty of Veterinary Medicine; Ghent University; Salisburylaan Merelbeke Belgium
| | - L. Lefère
- Department of Large Animal Internal Medicine; Faculty of Veterinary Medicine; Salisburylaan Merelbeke Belgium
| | - D. De Clercq
- Department of Large Animal Internal Medicine; Faculty of Veterinary Medicine; Salisburylaan Merelbeke Belgium
| | - G. van Loon
- Department of Large Animal Internal Medicine; Faculty of Veterinary Medicine; Salisburylaan Merelbeke Belgium
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Dufourni A, De Clercq D, Vera L, Broux B, Lefère L, Bosseler L, Versnaeyen H. Pheochromocytoma in a horse with polymorphic ventricular tachycardia. VLAAMS DIERGEN TIJDS 2017. [DOI: 10.21825/vdt.v86i4.16185] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
A twenty-four-year-old mare, which had been examined seven years earlier for mitral valve regurgitation and mild left sided cardiomegaly, was presented with tachycardia, profuse sweating and muscle fasciculations. Blood examination revealed an increased packed cell volume, metabolic acidosis, hypocalcemia, hyperglycemia and increased cardiac troponin I concentration. ECG revealed ventricular premature beats and monomorphic ventricular tachycardia followed by polymorphic ventricular tachycardia with R-on-T phenomenon. The horse was treated immediately with hypertonic solution followed by isotonic solution and calcium, but the general condition deteriorated within forty-five minutes after arrival. The horse was euthanized due to poor prognosis. On necropsy, a pheochromocytoma of the left adrenal gland was found. Although this horse had undergone a cardiovascular examination seven and one year prior to the onset of the clinical signs, no indications for a neoplastic process or symptoms of a pheochromocytoma were found at that time. Early diagnosis of pheochromocytoma is based on catecholamine mediated cardiovascular effects, blood examination, blood pressure measurement, rectal palpation and rectal ultrasound of the adrenal gland. Based on a retrospective analysis of echocardiographic images and measurements, no predisposing factors were found. In this article, the importance of including pheochromocytoma as a differential diagnosis is highlighted, especially in older horses with acute polymorphic ventricular tachycardia, sweating, muscle tremors and signs of acute abdominal pain.
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Paulussen E, Lefère L, Bauwens C, Broux B, De Clercq D, Loon G. Yellow fat disease (steatitis) in 20 equids: Description of clinical and ultrasonographic findings. EQUINE VET EDUC 2017. [DOI: 10.1111/eve.12793] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- E. Paulussen
- Department of Large Animal Internal Medicine Faculty of Veterinary Medicine Ghent University Merelbeke Belgium
| | - L. Lefère
- Department of Large Animal Internal Medicine Faculty of Veterinary Medicine Ghent University Merelbeke Belgium
| | - C. Bauwens
- Department of Large Animal Internal Medicine Faculty of Veterinary Medicine Ghent University Merelbeke Belgium
| | - B. Broux
- Department of Large Animal Internal Medicine Faculty of Veterinary Medicine Ghent University Merelbeke Belgium
| | - D. De Clercq
- Department of Large Animal Internal Medicine Faculty of Veterinary Medicine Ghent University Merelbeke Belgium
| | - G. Loon
- Department of Large Animal Internal Medicine Faculty of Veterinary Medicine Ghent University Merelbeke Belgium
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Broux B, De Clercq D, Decloedt A, Ven S, Vera L, van Steenkiste G, Mitchell K, Schwarzwald C, van Loon G. Heart rate variability parameters in horses distinguish atrial fibrillation from sinus rhythm before and after successful electrical cardioversion. Equine Vet J 2017; 49:723-728. [DOI: 10.1111/evj.12684] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2016] [Accepted: 03/14/2017] [Indexed: 12/22/2022]
Affiliation(s)
- B. Broux
- Department of Large Animal Internal Medicine, Faculty of Veterinary Medicine; Ghent University; Merelbeke Belgium
| | - D. De Clercq
- Department of Large Animal Internal Medicine, Faculty of Veterinary Medicine; Ghent University; Merelbeke Belgium
| | - A. Decloedt
- Department of Large Animal Internal Medicine, Faculty of Veterinary Medicine; Ghent University; Merelbeke Belgium
| | - S. Ven
- Department of Large Animal Internal Medicine, Faculty of Veterinary Medicine; Ghent University; Merelbeke Belgium
| | - L. Vera
- Department of Large Animal Internal Medicine, Faculty of Veterinary Medicine; Ghent University; Merelbeke Belgium
| | - G. van Steenkiste
- Department of Large Animal Internal Medicine, Faculty of Veterinary Medicine; Ghent University; Merelbeke Belgium
| | - K. Mitchell
- Equine Clinic; University of Zurich; Zurich Switzerland
| | | | - G. van Loon
- Department of Large Animal Internal Medicine, Faculty of Veterinary Medicine; Ghent University; Merelbeke Belgium
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Broux B, Gryspeerdt A, Amory H, Frippiat T, Gasthuys F, Legrand L, Deprez P. Prevalence of respiratory pathogens in nasal swabs from horses with acute respiratory disease in Belgium. VLAAMS DIERGEN TIJDS 2016. [DOI: 10.21825/vdt.v85i4.16332] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Contagious respiratory infections are an important cause of respiratory disease in horses, resulting in impaired pulmonary function, poor performance and sometimes severe illness. Although bacterial infections are often suspected to be involved, viruses are frequently overlooked and are an underestimated cause of respiratory disease outbreaks in horses. In this study, nasal swabs of 103 horses with acute symptoms of respiratory disease were analyzed for the presence of 13 different respiratory pathogens. Gamma herpesviruses were the most commonly detected, with 60% of the samples being positive, followed by streptococcus equi subsp. zooepidemicus infection (30%). Rhinovirus B, streptococcus equi subsp. equi, adenovirus 1 and EHV-4 were more rarely detected. Further research is necessary to correctly interpret the importance of gamma herpesviruses in horses, for example by screening a healthy control population. National surveillance of respiratory viruses in horses by PCR analysis on nasal swabs might be a useful, earlywarning system for viral epidemics.
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Broux B, De Clercq D, Decloedt A, Van Der Vekens N, Verheyen T, Ven S, Pardon B, van Loon G. Atrial Premature Depolarization-Induced Changes in QRS and T Wave Morphology on Resting Electrocardiograms in Horses. J Vet Intern Med 2016; 30:1253-9. [PMID: 27209267 PMCID: PMC5089572 DOI: 10.1111/jvim.13957] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2015] [Revised: 04/06/2016] [Accepted: 04/13/2016] [Indexed: 11/28/2022] Open
Abstract
Background The electrocardiographic differentiation between atrial (APDs) and ventricular (VPDs) premature depolarizations is important. P wave prematurity and normal QRS and T wave morphology generally are used as discriminating criteria for APDs. Hypothesis/Objectives The aim of this study was to determine whether P, Q, R, S, and T wave amplitude, PQ interval, QRS and P wave duration and P and T wave morphology differ between APDs and sinus beats. To determine the relationship between the RR coupling interval and the change in S wave amplitude between sinus beats and APDs. Methods Case–control study. From a modified base‐apex configuration of 30 horses with APDs at rest, sinus beat and APD associated preceding RR interval, P, PQ and QRS duration and P, R, S, and T wave amplitudes were measured. Linear mixed models and logistic regression were used to determine the effect of APDs on the ECG variables studied. Results In comparison to sinus beats, APDs were associated with a significant (P < .001) change in P amplitude (−0.03 ± 0.01 mV) and increase in S (0.20 ± 0.02 mV) and T (0.08 ± 0.03 mV) amplitude. PQ (−20.3 ± 5.2 ms) and RR (−519 ± 14 ms) interval and P duration (−21.1 ± 3.0 ms) decreased (P < .001). APDs were significantly associated with a singular positive P wave (OR: 11.0, P < .001) and were more likely to have a monophasic positive T wave (OR: 9.2, P < .001). A smaller RR coupling interval was associated with an increased relative difference in S amplitude (P < .01). Conclusions Atrial premature depolarizations may lead to changes in QRS and T wave morphology. Knowledge of these changes is important to avoid interpreting certain APDs as VPDs.
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Affiliation(s)
- B Broux
- Department of Large Animal Internal Medicine, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820, Merelbeke, Belgium
| | - D De Clercq
- Department of Large Animal Internal Medicine, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820, Merelbeke, Belgium
| | - A Decloedt
- Department of Large Animal Internal Medicine, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820, Merelbeke, Belgium
| | - N Van Der Vekens
- Department of Large Animal Internal Medicine, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820, Merelbeke, Belgium
| | - T Verheyen
- Department of Large Animal Internal Medicine, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820, Merelbeke, Belgium
| | - S Ven
- Department of Large Animal Internal Medicine, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820, Merelbeke, Belgium
| | - B Pardon
- Department of Large Animal Internal Medicine, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820, Merelbeke, Belgium
| | - G van Loon
- Department of Large Animal Internal Medicine, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820, Merelbeke, Belgium
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Decloedt A, De Clercq D, Ven Sofie S, Van Der Vekens N, Sys S, Broux B, van Loon G. Echocardiographic measurements of right heart size and function in healthy horses. Equine Vet J 2016; 49:58-64. [DOI: 10.1111/evj.12554] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2015] [Accepted: 12/13/2015] [Indexed: 01/14/2023]
Affiliation(s)
- A. Decloedt
- Department of Large Animal Internal Medicine; Faculty of Veterinary Medicine; Ghent University; Belgium
| | - D. De Clercq
- Department of Large Animal Internal Medicine; Faculty of Veterinary Medicine; Ghent University; Belgium
| | - S. Ven Sofie
- Department of Large Animal Internal Medicine; Faculty of Veterinary Medicine; Ghent University; Belgium
| | - N. Van Der Vekens
- Department of Large Animal Internal Medicine; Faculty of Veterinary Medicine; Ghent University; Belgium
| | - S. Sys
- Department of Large Animal Internal Medicine; Faculty of Veterinary Medicine; Ghent University; Belgium
| | - B. Broux
- Department of Large Animal Internal Medicine; Faculty of Veterinary Medicine; Ghent University; Belgium
| | - G. van Loon
- Department of Large Animal Internal Medicine; Faculty of Veterinary Medicine; Ghent University; Belgium
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Broux B, Lefère L, Deprez P, van Loon G. Plasma exchange as a treatment for hyperbilirubinemia in 2 foals with neonatal isoerythrolysis. J Vet Intern Med 2015; 29:736-8. [PMID: 25818226 PMCID: PMC4895511 DOI: 10.1111/jvim.12549] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2014] [Revised: 12/15/2014] [Accepted: 01/14/2015] [Indexed: 11/27/2022] Open
Affiliation(s)
- B Broux
- Department of Large Animal Internal Medicine, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
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van Loon G, Lefère L, Bauwens C, Kleyn K, Broux B, De Clercq D, Deprez P. Clinical Research Abstracts of the British Equine Veterinary Association Congress 2015. Equine Vet J 2015; 47 Suppl 48:19. [PMID: 26375299 DOI: 10.1111/evj.12486_43] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
REASONS FOR PERFORMING THE STUDY Yellow fat disease or steatitis is characterised by a local or general inflammation of fat tissue and is occasionally found in horses. Diagnosis is challenging because of the wide range of nonspecific clinical signs. OBJECTIVES To describe clinical signs, treatment, outcome and ultrasonographic findings in horses with steatitis. STUDY DESIGN Retrospective study (January 2008 to January 2015). METHODS History, clinical signs, ultrasonographic findings, diagnosis, treatment and outcome were recorded. RESULTS Twenty cases (18 horses, 2 donkeys; 9 mares, 9 stallions, 2 geldings) were retrieved from 13,707 patient records. Mean age was 1.6 (± 0.8) years (range 1 month-3.5 years). All cases appeared between October and February except for one (August). History included dullness, recumbency, decreased appetite and weight loss. Fever, ventral oedema, stiff/painful gait and painful neck were found. Low haematocrit, low vitamin E and selenium and increased levels of creatinine kinase and particularly lactate dehydrogenase were almost consistent findings. On ultrasound, ventral oedema was found. Subperitoneal, perirenal, mesenteric, coronary and caudal mediastinal fat showed homogenously increased echogenicity. Especially the subperitoneal fat was surrounded by oedema or free fluid. Increased amounts of abdominal, thoracic and pericardial fluid were often found. Fat biopsies were taken in the neck or from the retroperitoneal fat in the ventral flank. In all horses where fat biopsy was taken (n = 13), steatitis was confirmed. Treatment consisted of selenium and vitamin E (intra-muscular injection followed by oral treatment) supplementation and anti-inflammatory treatment (dexamethasone or prednisolone parenteral or oral) for at least 1-4 weeks. Fourteen animals (70%) survived. Full recovery took about 2-6 months. CONCLUSIONS Yellow fat disease may be underdiagnosed because of the nonspecific clinical signs. Ultrasound was extremely helpful for making a diagnosis. Recovery was rather slow but was achieved in 70% of the animals. Ethical animal research: Research ethics committee oversight not currently required by this conference: retrospective study of clinical records. Explicit owner informed consent for inclusion of animals in this study was not stated. SOURCE OF FUNDING Ghent University (institutional). Competing interests: None declared.
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Affiliation(s)
- G van Loon
- Department of Large Animal Internal Medicine, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
| | - L Lefère
- Department of Large Animal Internal Medicine, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
| | - C Bauwens
- Department of Large Animal Internal Medicine, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
| | - K Kleyn
- Department of Large Animal Internal Medicine, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
| | - B Broux
- Department of Large Animal Internal Medicine, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
| | - D De Clercq
- Department of Large Animal Internal Medicine, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
| | - P Deprez
- Department of Large Animal Internal Medicine, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
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Abstract
Atypische myopathie (AM) is een vaak fatale weidemyopathie die snel opkomt in Europa. Uitbraken zijn meestal acuut en onverwacht en het is belangrijk dat dierenartsen en eigenaars weten hoe ze moeten omgaan met de kritieke patiënten van deze aandoening. Er zijn verschillende hypothesen beschreven omtrent de etiologie en pathogenese ervan. In deze review worden de belangrijkste hypothesen samengevat en enkele behandelingsmogelijkheden en preventieve maatregelen gesuggereerd. Op dit moment wordt gedacht dat AM ontstaat na opname van esdoornzaden. Deze zaden bevatten hypoglycine A, dat kan leiden tot multiple acyl-CoA dehydrogenasedeficiëntie (MADD). De behandeling is meestal gebaseerd op de klinische symptomen en gaat vaak niet verder dan een ondersteunende therapie. Daarom ligt de nadruk op de preventie van AM. Dit artikel is bedoeld als een praktische ondersteuning voor paardendierenartsen die te maken krijgen met AM.
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16
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Broux B, Shamim Z, Wang T, Spellman S, Haagenson M, Stinissen P, Ryder LP, Müller K, Hellings N. The influence of interleukin-7 receptor α-chain haplotypes on outcome after allogeneic hematopoietic cell transplantation. Int J Immunogenet 2014; 41:521-7. [PMID: 25352021 DOI: 10.1111/iji.12158] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2014] [Revised: 09/29/2014] [Accepted: 10/06/2014] [Indexed: 11/26/2022]
Abstract
We investigated the influence of IL-7 receptor α-chain (IL-7Rα) gene haplotypes in donors on the outcome of haematopoietic cell transplantation (HCT). Unlike the association between single donor SNPs and HCT outcome found previously, only trends towards association were found here, due to 'dilution' of SNPs into haplotypes.
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Affiliation(s)
- B Broux
- School of Life Sciences, Hasselt University, Biomedical Research Institute and transnationale Universiteit Limburg, Diepenbeek, Belgium
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Broux B, Lefère L, Van Loon G. “Pituitary pars intermedia dysfunction” bij het paard: belangrijke aandachtspunten en recente ontwikkelingen. VLAAMS DIERGEN TIJDS 2013. [DOI: 10.21825/vdt.v82i1.16727] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
“Pituitary pars intermedia dysfunction” (PPID), vroeger vooral bekend onder de naam “Cushing’s disease”, is een veel voorkomende aandoening bij oudere paarden. Omdat het aantal oudere paarden de laatste decennia stijgt, wordt ook PPID steeds vaker gediagnosticeerd. Recent onderzoek heeft geleid tot nieuwe inzichten in het ontstaan van de ziekte en een verbetering van diagnostische testen en behandelingsmogelijkheden. Dit artikel beschrijft de pathofysiologie en de klinische symptomen, evenals de recentste ontwikkelingen betreffende de diagnose en behandeling van PPID.
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van Loon G, Broux B, Torfs S, Deprez P. Letter to the Editor. J Vet Intern Med 2012. [DOI: 10.1111/j.1939-1676.2012.01021.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
Affiliation(s)
- G. van Loon
- Department of Large Animal Internal Medicine, Faculty of Veterinary Medicine; Ghent University; Salisburylaan 133; 9820; Merelbeke; Belgium
| | - B. Broux
- Department of Large Animal Internal Medicine, Faculty of Veterinary Medicine; Ghent University; Salisburylaan 133; 9820; Merelbeke; Belgium
| | - S. Torfs
- Department of Large Animal Internal Medicine, Faculty of Veterinary Medicine; Ghent University; Salisburylaan 133; 9820; Merelbeke; Belgium
| | - P. Deprez
- Department of Large Animal Internal Medicine, Faculty of Veterinary Medicine; Ghent University; Salisburylaan 133; 9820; Merelbeke; Belgium
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Broux B, Torfs S, Wegge B, Deprez P, Loon G. Acute Respiratory Failure Caused by Leptospira spp. in 5 Foals. J Vet Intern Med 2012; 26:684-7. [DOI: 10.1111/j.1939-1676.2012.00902.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2011] [Revised: 11/29/2011] [Accepted: 01/26/2012] [Indexed: 12/12/2022] Open
Affiliation(s)
- B. Broux
- Department of Large Animal Internal Medicine
| | - S. Torfs
- Department of Large Animal Internal Medicine
| | - B. Wegge
- Department of Pathology; Faculty of Veterinary Medicine; Ghent University; Merelbeke; Belgium
| | - P. Deprez
- Department of Large Animal Internal Medicine
| | - G. Loon
- Department of Large Animal Internal Medicine
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