Electrocardiographic markers of myocardial conduction and repolarization in boxer dogs
Carvalho E.R, Zacché E., Fenerich M., Camacho A.A., Santos J.P. & Sousa M.G. 2020. Electrocardiographic markers of myocardial conduction and repolarization in Boxer dogs. Pesquisa Veterinária Brasileira 40(8):630-636. Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista...
| Autores: | , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2020 |
| País: | Brasil |
| Institución: | Universidade Estadual Paulista (UNESP) |
| Repositorio: | Repositório Institucional da UNESP |
| Idioma: | inglés |
| OAI Identifier: | oai:repositorio.unesp.br:11449/208200 |
| Acceso en línea: | http://dx.doi.org/10.1590/1678-5150-PVB-6265 http://hdl.handle.net/11449/208200 |
| Access Level: | acceso abierto |
| Palabra clave: | Arrhythmias Boxer dogs Canine Conduction Electrocardiography Myocardium Premature cardiac complexes Repolarization |
| Sumario: | Carvalho E.R, Zacché E., Fenerich M., Camacho A.A., Santos J.P. & Sousa M.G. 2020. Electrocardiographic markers of myocardial conduction and repolarization in Boxer dogs. Pesquisa Veterinária Brasileira 40(8):630-636. Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista “Júlio do Mesquita Filho”, Via de Acesso Prof. Paulo Donato Castellane s/n, Jaboticabal, SP 14884-900, Brazil. E-mail: beth_rcarvalho@hotmail.com Electrocardiographic markers have been used in people to classify arrhythmogenic risk. The aims of this study were to investigate electrocardiographic markers of conduction and repolarization in Boxers and non-Boxer dogs, and compare such findings between groups. Ten-lead standard electrocardiograms of Boxer dogs and non-Boxers recorded from 2015 to 2018 were retrospectively reviewed. Dogs ≥4 years of age and weighing >20kg were included. Animals with valvular insufficiencies, congenital cardiopathies, cardiac dilation, suspected systolic dysfunction, biphasic T-wave, bundle branch blocks, and those receiving antiarrhythmics were excluded. Electrocardiographic markers of conduction, QRS duration (QRSd) and dispersion (QRSD), and repolarization (corrected QT interval, Tpeak-Tend, JT and JTpeak), as well as derived indices, were measured. Two hundred dogs met the inclusion/exclusion requirements, including 97 Boxers (8.1±2.5 years old; 30±7kg) and 103 non-Boxer (8.8±2.5 years old, 30±8kg). QRSd and QRSD, and repolarization markers in lead II and left precordial lead V4 were considered similar between groups. Dispersion of late repolarization on lead rV2, Tpeak-Tend interval, was considered longer in Boxers (45±8ms vs 38±10ms, P=0.01). The Tpeak-Tend/JTpeak and the JTpeak/JT also differed between groups. Our results indicate that the dispersion of myocardial late repolarization in lead rV2 is slower in Boxers than other dog breeds. |
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