ABSTRACT
Objective To investigate the safety of the application of dexmedetomidine in patients with heart failure .Methods The selective cardiac surgery 80 patients with heart failure were randomly divided into two groups ( n =20 each):group I:0.5 μg/kg dexmedetomidine intravenous injection in 10 min;and group II:control group.Systolic blood pressure (SBP), diastolic blood pres-sure (DBP), heart rate (HR), oxygen saturation (SpO2), and bispectral index (BIS) were recorded at 10, 20, 30 min after injec-tion.Cardiac output (CO) and stroke volume variation (SVV) were also recorded at the time after radial artery and internal jugular vein puncture , and Ramsay and visual analogue scale ( VAS) score were also given to each patients of two groups at 30 min.Results The SBP, DBP, HR, and BIS of group I were lower than group II at 10 and 20 min after injection ( P <0.05 ); the SBP, DBP, HR, and BIS of group I were also lower than group II at the time after radial artery and internal jugular vein puncture [ SBP:(124.9 ± 15.5)mmHg vs (138.7 ±17.8)mmHg;(128.9 ±17.8)mmHg vs (140.3 ±19.3)mmHg, P <0.05;DBP:(69.4 ±10.2)mmHg vs (80.1 ±11.2)mmHg;(70.5 ±11.8)mmHg vs (87.7 ±13.6)mmHg, P <0.05;HR:(65.3 ±9.4)bpm vs (78.8 ±10.9)bpm;(68.2 ±10.8)bpm vs (80.9 ±13.3)bpm, P <0.05;BIS:84.5 ±5.7 vs 95.4 ±3.7;87.8 ±7.7 vs 95.3 ±4.7, P <0.05]; The CO, SVV, and SpO2 were no difference between two groups;the Ramsay(3.4 ±1.5 vs 1.2 ±0.4;3.9 ±1.7 vs 1.4 ±0.5) and VAS (2.1 ±0.7 vs 3.8 ±2.1;1.9 ±1.5 vs 4.1 ±2.1)score of group I were lower than group II ( P <0.05).Conclusions A amount (0.5 μg/kg) of dexmedetomidine intravenous injection can be safely used in patients with heart failure .
