Results: Intervention group with nicardipine had increasing pulse rate from 86.8 ± 7.6 bpm to 102.7 ± 9.8 bpm at the time of 1 minute after injecting nicardipine (/ phút tại thời điểm 1 phút sau tiêm Nicardipin (about 18%) and reached up to 106.5 ± 10.0 bpm (about 19%) at the time of intubation, then decreased to safety level (below 100 bpm).