P’ wave axis analysis for the identification of sustained focal atrial tachycardia from low atrial origin - case report / Análise do eixo da onda P para identificação de taquicardia atrial sustentada com origem atrial baixo- relato de caso

Pedro Pablo Martínez Padua


Anamnesis: A 8-year-old female poodle was presented by a clinical examination, being evidenced tachycardia over the auscultation.the patient was referred to cardiac assessment. Clinical and laboratory findings: At admission the surface ECG showed sustained runs of complex atrial tachycardia, with a ventricular cycle length (R-R interval) of 240 ms. According to the leads ECG system to the P wave axis on the frontal plane, it present an inferior-to-superior, right-to-left axis; these characteristics were indicative of a Focal Atrial Tachycardia (FAT) from low atrial origin, arising from the Coronary Sinus Ostium (CSO). Treatment approach: Radiofrequency catheter ablation is the recommended treatment from FAT, but in the absence must to be used pharmacological treatment. The drugs of choice were a b-blocker and calcium channel blockers. Conclusion: The combination and the dosages used in the pharmacological treatment of this casewere effective, provided a good control on heart rate in dogs with FAT arising from low atrial origin.


Canine, Arrhythmia, Holter, FAT.

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DOI: https://doi.org/10.34188/bjaerv3n3-135


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