Echocardiographic Parameters and Indices in Healthy Labrador Retriever Dogs

The normal echocardiographic parameters in Labrador retriever dogs were determined and correlated with body weight, age and sex. Thirty-one clinically healthy Labrador retriever dogs of both sexes (18 males and 13 females) were used for determining echocardiographic reference values. Twenty four dogs were in the body weight range of 20-40 kg and 7 dogs in 40-60 kg range. To study the effect of age on various echocardiographic measurements dogs were divided into 4 age groups (1-2, 2-3, 3-5 and >5 years of age). M-mode and 2 dimensional echocardiographic parameters were carried out by using GE Logiq P5 Color Doppler. The right ventricular internal dimensions during diastole (RVIDd), left ventricular internal dimension at end-diastole (LVIDd), left ventricular internal dimension at end-systole (LVIDs) were significantly (P<0.05) affected by body weight. E-Point-to Septal Separation (EPSS), End Diastolic Volume (EDV), End Diastolic Volume Index (EDVI), End Systolic Volume (ESV), End Systolic Volume Index (ESVI) were significantly (P<0.05) affected by body weight. There was significant (P<0.05) effect of age on left ventricular internal and wall dimensions, EDV and EPSS. Gender has no significant effect on any M mode parameter except for significant effect on RVIDd.