Hypothermia was successfully initiated in 96.3 % of patients , and median [ interquartile range ] temperature at first balloon inflation was 34.7 [ 34.0-34 .9 ] C. Median door-to-balloon times in the hypothermia and control groups were 62 [ 51-81 ] and 47 [ 37-55 ] minutes , respectively ( P = 0.007 ) .