Electrocardiographic Abnormalities in Hypertension Models
Int. j. cardiovasc. sci. (Impr.)
;
33(4): 321-328, July-Aug. 2020. tab, graf
Artículo
en Inglés
| LILACS
| ID: biblio-1134389
ABSTRACT
Abstract Background:
Hypertensive condition can lead to abnormalities in heart structure and electrical activity. The electrocardiogram (ECG) is a recording of the electrical activity of the heart and widely used to diagnose and detect heart problem.Objective:
We conducted a comparative ECG analysis between two hypertension models (L-NAME and SHR) and their controls (Wistar and Wistar-Kyoto) at six and 15 th week of age.Methods:
Blood pressure was measured at the end of the 15 th week, and electrocardiography was performed at six and 15 weeks of age in anaesthetized rats. Data normality was confirmed by Kolmogorov-Smirnov test followed by unpaired Student's t-test and the Mann-Whitney for parametric and non-parametric data, respectively. Results are expressed as mean ± SD. The accepted level of significance was set at p < 0.05.Results:
L-NAME exhibited prolongation of JT and QT intervals and SHR showed a decrease in heart rate when compared to Wistar-Kyoto and L-NAME. Wistar-Kyoto exhibited short PR interval with increased QRS complex, and only QT prolongation at 15 weeks compared to Wistar.Conclusions:
All the hypertension models used in this study featured an increase in blood pressure. However, while SHR showed cardiac dysfunction, L-NAME exhibited changes in ventricular performance. These results may guide future studies on different types and models of hypertension.
Texto completo:
Disponible
Índice:
LILACS (Américas)
Asunto principal:
Electrocardiografía
/
Hipertensión
Límite:
Animales
Idioma:
Inglés
Revista:
Int. j. cardiovasc. sci. (Impr.)
Asunto de la revista:
Cardiología
Año:
2020
Tipo del documento:
Artículo
País de afiliación:
Brasil
Institución/País de afiliación:
Universidade Estadual de Campinas/BR
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