Electrocardiography study in the dogs subjected to ovariohysterectomies anaesthetized with tiletamine-zolazepam and ketamine-diazepam combinations

Abstract

The study was conducted to evaluate the electrocardiographic changes in 12 healthy female dogs undergoing ovariohysterectomy pre-anaesthetized with xylazine. These dogs were randomly divided into two equal groups. In Group I induction and maintenance of anaesthesia was achieved using Tiletamine – Zolazepam (3 mg/kg BW IV) combination whereas in Group II induction and maintenance of anaesthesia was achieved using Ketamine (3 mg/kg BW IV) preceded by administration of Diazepam (0.25 mg/kg BW IV). Significant increase in the value of P wave duration was observed at 30 min. P-R and Q-T interval was significantly increased at different time intervals. Amplitude of T wave was increased in both groups. Sinus arrhythmia and sinus bradycardia were recorded in both groups, however, first degree AV block was observed in Group I.