Avaliação do perfil eletrocardiográfico pré e trans-anestesia em lobos-guará

Abstract

The aim of this study was to assess the effects of the anesthetic combination of Tiletamine/Zolazepam on the cardiorespiratory function and electrocardiographic profile in captive maned wolves (Chrysocyon brachyurus). Ten maned wolves were used in this study (6 males and 4 females). All animals were healthy, with an average body weight of 23.5±3.5kg, and age of 6.5±2.8years. The wolves were conditioned to be physically restrained by their keepers in order to minimize stress during assessment of pre-anesthetic parameters. Data on heart and respiratory rates, rectal temperature, mean arterial blood pressure and electrocardiography were collected. Pre-anesthetic physiological an eletrocardiographic parameters were collected before the administration of 5.1±0.73mg/kg Tiletamine/Zolazepam intramuscularly. Under anesthesia, electrocardiogram electrodes were placed on thoracic and pelvic limbs and eletrocardiographic data was recorded every 10 minutes for approximately one hour, totaling 6 electrocardiograms. Heart rate 153±20bmp, respiratory rate 29±6mpm, rectal temperature 38,4±1°C,mean arterial blood pressure 114±20mmHg, and the other electrocardiographic parameters did not change; however, the P wave amplitude changed from 10 to 50 minutes after anesthesia. The increase in the P wave on the animals in this study suggested an atrial increase, probably due to cardiac disease or just by increasing the heart rate during the capture.