[Changes of EKG PQ interval in German Shepherd and Cocker Spaniel dogs during premedication and general anaesthesia]
2004
Avdosko, G.(Latvia Univ. of Agriculture, Jelgava (Latvia). Faculty of Veterinary Medicine. Preclinical Inst.) | Birgele, E.(Latvia Univ. of Agriculture, Jelgava (Latvia). Faculty of Veterinary Medicine)
The regularities of the PQ interval dynamics of the EKG II standard lead under the influence of preanaesthetic agents atropine sulphate and acepromazine maleate as well as an anaesthetic ketamine hydrochloride in combination with diazepam were investigated in 64 dogs of Cocker Spaniel and German Shepherd breed. For the premedication 0.054% atropine sulphate solution (0.02 mg/kg) in combination with 1% acepromazine maleate solution (0.06 mg/kg) was administrated intramuscularly. For the general narcosis 5% ketamine hydrochloride solution (6 mg/kg) in combination with 0.5% diazepam solution was administrated intravenously (v.cephalica). It was established that the PQ interval dynamics under the total influence of the premedication and anaesthetic preparations were significantly connected with the age of the dog. The PQ interval was significantly prolonged in German Shepherd breed dogs (p0.05), but in Cocker Spaniel breed dogs it was comparatively little changed. The total effect of the anaesthetic agents ketamine hydrochloride and diazepam at the background of the premedication impact in German Shepherd dogs was manifested as the PQ interval significant shortening in the first minute after their administration (p0.05), while in the Cocker Spaniel breed dogs the PQ interval shortening occured evenly during the first 15 minutes. On the whole, the PQ interval shortening influenced by ketamine hydrochloride and diazepam in both dog breeds was statistically significant (p0.05).
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