Correlation of echocardiographic parameters and indices of normal healthy Indian dogs with their body weight

The aim of the study was to establish normal reference echocardiographic values for Indian dogs and to determine the potential dependence of intracardiac parameters on body weight irrespective of the age factor. M-mode and two dimensional echocardiography was performed on 65 healthy dogs. Intracardiac measurements included interventricular septal thickness (IVS), leftventricular internal diameter (LVID), left ventricular posterior wall thickness (LVPW) both in systole and diastole, as well as left atrial internal diameter (LA), and aortic diameter (Ao) in early diastole. Fractional shortening (FS), ejection fraction (EF), end-diastolic and end-systolic left ventricular volumes (EDV, ESV), stroke volume (SV) as well as LA/Ao and Ao/LA ratios were calculated from these parameters. Body weight positively correlated with all left ventricular parameters, such as IVSd, IVSs, LVIDd, LVIDs, LVPWd, and LVPWs. LA and Ao values also showed positive correlation to body weight. LVM followed a positive correlation with polynomial mathematical trend of the order of two.