Horses of group K required significantly higher concentrations of isoflurane ( group A : @ @ % ; group K : @ @ % ) and had an overall lower MAP ( group A : @ @ mmHg ; group K : @ @ mmHg ) and CO ( group A : @ @ l/min ; group K : @ @ l/min ) but needed significantly more dobutamine ( group A : @ @ g/kg/min ; group K : @ @ g/kg/min ) compared to group A. Complete relaxation occurred @ @ minutes after atracurium bolus and lasted for @ @ minutes .