Banca de DEFESA: CAROLINA DO VALLE ABEN ATHAR

Morphofunctional Evaluation of The Right Atrial of Beagle Dogs Using Two-Dimensional Echocardiography

Cardiology; Right atrium; Dog; echocardiography 2D

As they reflect the function of the right ventricle (RV), the morphology and function of the right ventricle (RA) are of great clinical importance, in addition to being strongly associated with clinical cases in many conditions, such as pulmonary hypertension. Few works in veterinary medicine establish normality values for the morphology and function (reservoir, conduit and pump) of the RA or explained among the techniques applied in its evaluation by means of two-dimensional echocardiography. The aim of the present study was to evaluate the morphology and function of the right of Beagle dogs by means of two-dimensional echocardiography. The animals were screened through clinical, laboratory and echocardiographic examinations, in which 39 healthy dogs, male and female, aged between 1 and 5 years and with a body condition score between 4-6/9 were selected. The animals underwent measurement of systemic blood pressure and electrocardiographic examination. To assess atrial morphology and function, a two-dimensional echocardiographic examination was performed using three different techniques: right atrial volume, direct atrial area (maximum, minimum and pre-atrial contraction) and linear measurement (maximum and minimum). the data were later rounded to suggest the reservoir, conduit and pump function of the AD through ejection collection or fractional area variation. Volume measurements (mL) did not show good repeatability due to the high coefficient of variation, unlike area (cm²), which showed good reproducibility. Both the volume and the strong positive regulated area with the minimal linear measure of the AD, suggesting to be a promising parameter in the evaluation of this chamber. In the analysis of the function, a positive negative result was observed between conduction and pump function, suggesting that when there is a decrease in passive atrial function, there will be an increase in active function. The variation between the measurements of the RA was moderately positive with the measures of the systolic and diastolic area of the RV, suggesting that when there is an increase in the RA, an increase in the RV is expected. In the analysis between the sexes, there was no difference between females and males in any of the AD measurements. Thus, the minimum linear measurement of the right proved to be a promising parameter in the evaluation of this chamber, as it is an easy-to-perform technique with good reproducibility.