Variabilidade interobservador entre três métodos de eletrocardiografia (convencional, digital e digital impresso) em gatos saudáveis / Variability inter-observer between three methods of electrocardiographic (conventional, computerized and computerized printed) on healthy cats
Porsani, Mariana Yukari Hayasaki; Oliveira, Luiz Eduardo Duarte de; Muzzi, Ruthnéa Aparecida Lázaro; Abreu, Claudine Botelho de; Pereira, Camila Santos; Figueiredo, Vânia Chaves de; Coelho, Mariana de Resende; Lacreta Junior, Antonio Carlos.
Acta sci. vet. (Impr.);
48: Pub.1761-Jan. 30, 2020. ilus, tab, graf
Artigo
em Português
| VETINDEX
| ID: biblio-1458284
Resumo
Background: Electrocardiography is an exam widely used in feline medicine. It consists of recording the electrical activity of the heart in waves representing myocardial depolarization and repolarization. Two electrocardiographic evaluation methods are employed in dogs and cats: computerized and conventional. However, possible differences in ECG results performed by the different methods have been reported. This paper aims to evaluate the observers interference in the interpretation of the electrocardiographic exams and possible differences between the methods: conventional single channel, computerized screen and computerized printed of healthy cats. Materials, Methods & Results: Electrocardiographic tracings were obtained from 58 healthy cats, aged between 1 and 10 years-old, of both sexes, of the Persian and mixed breed and therefore interpreted by 4 observers with similar degree of experience. The examinations were performed in a sequential manner, the computerized method first, and then the conventional method. The animals were gently contained in the right lateral decubitus position. The tracings obtained by the conventional method were printed on thermally sensitive graph paper. The computerized method was performed in computer by means of specific software (TEB® ECGPC version 6.2), being the waves delimited by the observer. The tracings were also printed by means of a jet printer, and also interpreted. The morphology of P waves, QRS complexes and T waves were analyzed in the derivations: I, II, III, aVR, aVL and aVF. Heart rate, amplitude and duration of the P, QRS and T waves, PR, QT and heart rate (HR) intervals were calculated in derivation II. Mean electric axis was determined in leads I and III. Comparing the methods, there was a difference observed in the values of P and R waves, QRS complex, QT and PR intervals and T wave polarity. The interpretation of the evaluators presented statistical differences in the duration of the P...
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