Electrocardiographic changes in anesthesia with ketamine in grass carp

ABSTRACT

To determine the influence of ketamine onelectrocardiogram parameters of grass carp.Design:Experimental Study.60 grass carp with average weight between 200-300g. For this study 60 grass carp with averageweight between 200-300 g were chosen. Fishes weredivided randomly into 4 group of 15 fishes. A group waschosen as control group and three groups wereanesthetized with bath method by ketamine in differentconcentration [80,100,120 mg/lit]. During anesthesia andat 15 and 30 minutes after recovery, the electrocardiogramof fishes were recorded. After recording theelectrocardiogram of all fishes, the average and standarddeviation of the electrocardiogram parameters [heart rate,PR and St segment, QRS,RR, TP distance] were measured. Data were analized using one wayanalysis of variance with software minitab- 10.5. The average of PR segment in concentrations 100and 120 mg/lit ketamine anesthesia were significantlymore than control group [P<0.05].The heart rate increasedsignificantly in comparison with control group, but TP andRR distance have decreased. These effects also observedduring recovery. No difference in QRS complexes wereobserved in all groups. According to the results of electrocardiogramparameters, anesthesia with ketamine has no marked effecton heart activities of fishes