RESUMENLa cardiomiopatía hipertrófica felina es una enfermedad primaria del miocardio que se caracteriza por una leve a severa hipertrofia concéntrica primaria del miocardio ventricular. Los factores hereditarios y mutaciones causales se han atribuido al desarrollo de la enfermedad en algunas razas, como los gatos Maine Coon y Ragdoll. Sin embargo, esta enfermedad sigue siendo un reto para los veterinarios debido a la dificultad del diagnóstico precoz y el riesgo de muerte súbita de los animales afectados. La ecocardiografía es una herramienta no invasiva de elección para el diagnóstico de las enfermedades cardíacas en los gatos. Nuevas técnicas ecocardiográficas como el Doppler Tesidual (el color bidimensional, el modo M a color y el modo de onda pulsada), Strain y Strain rate, han demostrado ser eficaces en el diagnóstico temprano de la disfunción del miocardio, incluso en ausencia de hipertrofia en el examen ecocardiográfico convencional. Esta revisión pretende acercar la información más reciente sobre el diagnóstico ecocardiográfico de la cardiomiopatía hipertrófica felina.
Mitral flow propagation velocity (Vp) is an index used to evaluate the left ventricular diastolic function. Its influence on human and small animal cardiopathies has been studied; however there are few reports evaluating this variable in domestic felines. In addition, there is a lack of studies in non-sedated healthy cats. Therefore, the purpose of this study was to establish values for Vp and its correlation with other echocardiographic indexes in non-sedated healthy cats in order to provide new perspectives related to diastolic function in this species. Twenty-six clinically healthy cats were submitted to echocardiography to assess the animals' cardiac conditions. Variables such as age, heart rate (HR), body surface area (BSA), initial (E mitral) and late (A mitral) ventricular filling waves, isovolumic relaxation time (IVRT) and E/IVRT relation were correlated to Vp. No proven relation between any of these variables and Vp was observed in this present study, except for HR and BSA. In the variability analysis, higher values were verified for inter-observer analysis. This study concludes that Vp proved to be an useful index for estimating left ventricular relaxation in non-sedated healthy domestic cats and provides reference ranges for this variable.
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