at +60 degrees a vasodepressor reaction consisting of syncope or near syncope , hypotension and bradycardia was produced by isoproterenol ( mean dose 6.0 +/- 0.26 micrograms ) in 8 patients from group 1 ( 66.6 % ) , 4 from group 2 ( 50 % ) , 0 from group 3 and 4 from group 4 ( 23.5 % ) .
C0428977
bradycardia
C0022245
isoproterenol