Auscultación cardíaca y sus posibles implicancias electrocardiográficas en equinos Fina Sangre de carrera en training

El estudio se realizo en 101 equinos F. S. de Carrera en competencia, seleccionados en forma aleatoria simple, los cuales se sometieron a un examen por auscultacion y electrocardiograma clasificandolos en normal y anormal; especificando el tipo de anor­malidad. La auscultacion entrego un 40,6% de equinos normales y 59,4% de anormales, de estos ultimos un 45% correspondio a soplos sistolicos, 8,3% a desdoblamiento de 1o tonocardiaco, 6,7 a soplos sistolicos con arritmia concomitante, 6,7% a desdoblamiento del 2o tono cardiaco y 10% a arrit­mias inespecificas, el resto de las anormalidades auscultadas presento cada una de ellas porcentajes inferiores al 5%. El estudio electrocardiografico entrego un 48,5% de equinos normales y un 51,5% de anorma­les, de estos ultimos un 26,9% presento signos de sobrecarga auricular, un 23,1 % marcapaso migra­torio, 7,7% arritmia sinusal, 7,7% de los casos presento en forma concomitante marcapaso migra­torio y sobrecarga auricular, el resto de las anorma­lidades presento valores inferiores al 6%. La rela­cion entre la auscultacion y el electrocardiograma, reflejo que las anormalidades cardiacas que no comprometen en forma importante los marcapasos y/o el sistema excitoconductor, no tienen expresion electrocardiografica, a diferencia de los trastornos del ritmo y/o conduccion cardiaca, los cuales tienen una fiel expresion electrica. Palabras claves: Equinos, electrocardiografia, training. Abstract One hundred one thoroughbred horses in training, sellected by alleatory simple method were subjected to auscultation and electrocardiographic examination. They were classified in normal and abnormals horses with the specification of the type of abnormality. At the auscultation exam, 40.6% of the horses were normal and 59.4% abnormal, where 45% corresponded to sistolic murmur, 8.3% splitting of the first heart sound, 6.7% .sistolic murmur with the concomitant arrithmia, 6.7% splitting of the second heart sound, and 10% of unspecific arrithmias. The remain of the auscultatory abnormalities presented a percen­tage lower 5% in each one of them. The electrocardiographic examination presented 48.5% of normal horses and a 51.5% of abnormal. From the latest group, 26.9% showed sinus of atrial over load 23.1% wandering pacemarker, 7.7% sinus arrithmia, 7.7% wandering pacemarker concomitant with a atrial over load. The rest of the abnormalities presented values lower than 6%. The relationship between the auscultation and the electrocardiographic examination, indicates that the cardiac abnormalities, which that not involved the pacemarker and the conduction svstem, do not present an electrocardio­graphic expression. On the other hand, alterations of the cardiac ritmm and conduction presented a faithful electric expression. Key words: Thoroughbred horses, electrocardiography, training.