The polarity and shape of the T wave in lead V-10 in Chihuahuas

Authors

DOI:

https://doi.org/10.33448/rsd-v12i10.43367

Keywords:

Electrocardiogram; T-wave; Ventricular repolarization; Chihuahua; Dog.

Abstract

The T-wave in the canine electrocardiogram can be positive, negative, or biphasic in most leads, while his amplitude should not be greater than 25% of the R wave. However, since the 1960’s persists controversy regarding the polarity of the T wave in Chihuahuas when compared to other canine breeds. This study aimed to clarify the polarity and shape of the T-wave in the lead V-10 in a group of healthy Chihuahuas. Retrospective eletrocardiographic study with a sample of 20 private client-owned Chihuahuas. The conclusion was that the polarity of the T-wave is usually negative and the shape is asymmetric, type “slow-fast/down-up”, in all dogs studied.

References

Bestermann E. & Creese R. (1979). Waller--pioneer of electrocardiography. Br Heart J. 42(1): 61–64. 10.1136/hrt.42.1.61.

Bolton G. R. (1975). Interpreting the electrocardiogram. Handbook of canine electrocardiography. WB Saunders. 39-87.

Brownlie S. (2000). Electrocardiografía. In: Manual de medicina y cirurgia cardiorespiratoria en pequeños animales. Fuentes V.L. & Swift S. Editora Harcourt. Madrid. pg. 83-92.

Detweiler K. & Patterson D. F. (1965). The prevalence and types of cardiovascular diseases of dogs. Annals of the New York Academy of Sciences. Volume (127): 481–516.

Detweiller D. K. (2010). The Dog Electrocardiogram. A Critical Review. In: Comprehensive Electrocardiology. Macfarlane, P.W., van Oosterom, A., Pahlm, O., Kligfield, P., Janse, M., Camm, J. (Eds.) Springer, London. https://doi.org/10.1007/978-1-84882-046-3-41.

Dijkstra M. & Szatmári V. (2009). The T wave in the V-10 precordial electrocardiographic lead is negative in healthy Chihuahua dogs. J. Vet. Cardiol. 11(2): 123-127. DOI: 10.1016/j.jvc.2009.04.004.

Einthoven W. (1902). Galvanometrische registratie van het menschelijk electrocardiogram. In: Herinneringsbundel SS ed. Rosenstein: Leiden Eduard Ijdo Leiden, 1902:101–106.

Ettinger S. J. & Sutter P. F. (1970). Electrocardiography. In: Canine Cardiology. pp. 102-169.

Filippi L. H. (2011). Traçado Eletrocardiográfico Normal. In: O Eletrocardiograma na Medicina Veterinária. Editora Rocca. 69-88.

Hamlin L. R & Smith C. R. (1960). Anatomical and physiologic basis for interpretation of the electrocardiogram. Am J Vet Res. 21:701–708.

Hellerstein H. K. & Hamlin R. (1960). Component of the Spatial Vectorcardiogram and of the Spatial Magnitude and Velocity Electrocardiograms of the Normal Dog. Am J Cardiol. (6),1049-61. 10.1016/0002-9149(60)90360-x.

Hill J. D. (1968). The Electrocardiogram in Dogs with Standardized Body and Limb Positions. J. Electrocardiology 1(2), 347-357.

Hill J. D. (1971). Electrocardiographic Diagnosis of Right Ventricular Enlargement in Dogs. J. Electrocardiology 4 (4), 347-357.

Lannek, N. (1949). A clinical and experimental study on the electrocardiogram in dogs. Thesis, Stockholm.

Macintire D. K, Drobatz J. K., Haskins S. C. & Saxon W. D. (2012). Normal Values for the Canine and Feline Electrocardiogram. Animal Emergency and Critical Care Medicine, Second Edition. John Wiley & Sons, Inc.

Mazzini A. M. & Prada D. G. (2020). Eletrocardiografia. In: Larsson MHMA Organizadora. Tratado de Cardiologia de Cães e Gatos. p. 61-85. Interbook Editorial. São Paulo.

Miller M. S., Tilley L. P., Smith Jr. & F. W. K., & Fox P. R. (1999). Electrocardiography. In: Textbook of Canine and Feline Cardiology. Principles and Clinical Practice. Second edition.

Fox P F. Et al., Eletrocardiography. In: Textbook of Canine and Feline Cardiology, Sisson D. and Moise N.S. Eds. W.B. Saunders Company. Philadelphia. New York. 67-105.

Montoya Alonso J. A. & Ramirez I. (2007). Complejo QRS. In: Manual Practico de Electrocardiografia em Pequeños Animales. Elservier-Masson, Barcelona. 85-96.

Oliveira P. (2018). Guide to Canine and Feline Electrocardiography. Ruth Willis, Pedro Oliveira & Antonia Mavropoulou. Wiley & Sons Ltd. John Wiley & Sons Ltd.

Pascon J. P. E. (2021). Módulo de Eletrocardiografia. Terapia Antiarrítmica- Cães e gatos. Editora Equalis.

Pastore C. A. et al. (2019). ECG/VCG in the current clinical practice. Arq. Bras. Cardiol. 113(1): 87-99.

Romito G., Castagna P., Pelle N. G., Testa F, Sabetti M. C., & Cipone M. (2022). The canine T wave: a retrospective analysis on qualitative and quantitative T wave variables obtained in 129 healthy dogs and proposed reference intervals. Journal of Veterinary Cardiology 42: 52-64.

Santilli R, et al. (2021). Eletrocardiografia de cães e gatos. Diagnóstico de arritmias. Segunda Edição. Med-Vet.

Schroeder N. Interpretation of the Electrocardiogram in Small Animals. John Wiley & Sons Inc. Hoboken, NJ 07030, USA.

Tilley L. P. (1985). Analysis of P–QRS–T deflections. Essentials of canine and feline electrocardiography. Second ed., Lea and Febiger, Philadelphia, USA, pp. 57–97.

Tilley L P, Miller M S & Smith Jr. F W K (1993). Canine and Feline Arrhythmias. Lea & Febiger Eds., Pensilvania.

Tilley L. P., Francis W. K. Smith Jr. & F. W. K. (2008). Chapter 3. Electrocardiography.in: Manual of Canine and Feline Cardiology. Fourth Edition by: Tilley L.P., Smith Jr. F.W.K. Sleeper M.M.

Trautvetter E., Detweiler D. K. & Patterson D. F. (1981). Evolution of the electrocardiogram in young dogs during the first 12 weeks of life. Journal of Electrocardiology. Volume 14, Issue 3: 267-274.

Waller A. D. (1888). Introductory address on the electromotive properties of the human heart. The British Medical Journal, October: 751-754.

Ware W. (1994). Disturbios do Sistema Cardiovascular. In: Fundamentos de Medicina Interna de Pequenos Animais. Nelson R. and Couto C.G. Guanabara Koogan Editora. Rio de Janeiro.

Willis R. (2018). Electrocardiography. In: Guide to Canine and Feline Electrocardiography Willis R., Oliveira P. and Mavropoulou A. (Eds.). Wiley & Sons Ltd. Oxford, UK.

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Published

02/10/2023

How to Cite

ALMEIDA, G. L. G. de .; ALMEIDA, M. B. de .; SANTOS, A. C. M. dos .; VARGAS, Ângela .; BALLOT, S. The polarity and shape of the T wave in lead V-10 in Chihuahuas. Research, Society and Development, [S. l.], v. 12, n. 10, p. e13121043367, 2023. DOI: 10.33448/rsd-v12i10.43367. Disponível em: https://rsdjournal.org/index.php/rsd/article/view/43367. Acesso em: 23 dec. 2024.

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Section

Agrarian and Biological Sciences