Electrocardiographically Determination of Cardiac Enlargements in Dogs

Authors : Remzi GÖNÜL, Mehmet Erman OR, Tamer DODURKA

Pages : 871-877

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Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :In this study, the electrocardiographic parameters necessary to determine cardiac enlargements and to establish and distinguish such complaints from each other in the early stage in dogs with circulatory problems were assessed. The material of the study consisted of 33 dogs 1.5-15 years of age with cardiac enlargements determined from 140 dogs suspected of having cardiac disease based on clinical, radiographic and electrocardiographic analyses. In these dogs, 12 cases of left atrial hypertrophy insert ignore into journalissuearticles values(LAH);, 6 cases of right atrial hypertrophy insert ignore into journalissuearticles values(RAH);, 22 cases of left ventricular hypertrophy insert ignore into journalissuearticles values(LVH); and 1 case of right ventricular hypertrophy insert ignore into journalissuearticles values(RVH); were determined. The results of electrocardiographic records showed lengthening in P wave duration in left atrial hypertrophy insert ignore into journalissuearticles values(0.07±0.01 mm/sec);, increase in P wave amplitude in right atrial hypertrophy insert ignore into journalissuearticles values(0.51±0.07 mV);, increase in R wave amplitude in left ventricular hypertrophy insert ignore into journalissuearticles values(3.07±0.57 mV);, and increase in S wave amplitude in right ventricular hypertrophy insert ignore into journalissuearticles values(2.8 mV);. In vectorcardiographic analysis, the mean electrical axis of the QRS complex was determined to be 75.83±20.16 degrees in left atrial hypertrophy, 76.5±10.43 degrees in right atrial hypertrophy, 51.76±36.29 degrees in left ventricular hypertrophy and -98 degrees in right ventricular hypertrophy. It was observed that cardiac enlargements can be easily detected via the I and aVF leads of electrocardiography. In this way, it was determined that atrial enlargements can be easily detected by increases in P wave duration or amplitudes of electrocardiography, and ventricular enlargements can be easily detected by increases in R or S waves amplitudes.
Keywords : Dog, electrocardiography, vectorcardiography, hypertrophy, dilatation