A bispectral index guided comparative evaluation of dexmedetomidine as an adjuvant to propofol-based total intravenous anaesthesia in spine surgeries done under motor-evoked potential monitoring

Ain-Shams Journal of Anesthesiology

Table 2 Comparison of heart rate (HR) between group P and DP

Heart rate (HR) (beats/min)	Group P (n = 64)		Group DP (n = 64)		¹p value
Heart rate (HR) (beats/min)	Mean	± SD	Mean	± SD	¹p value
Baseline	59.67	5.17	88.98	6.38	< 0.001^*
At intubation	90.27	9.43	89.47	9.67	0.638
On starting agents	79.27	8.08	79.47	7.65	0.884
10 min	83.84	7.07	83.81	8.14	0.982
20 min	86.05	10.11	85.08	10.05	0.588
30 min	83.69	10.17	83.58	9.12	0.949
60 min	84.69	5.31	83.30	5.52	0.149
120 min	83.52	8.72	82.55	9.69	0.553
180 min	84.35	10.71	83.87	10.23	0.823
End of surgery	79.50	9.76	79.02	8.34	0.763
At extubation	82.89	6.26	84.38	6.80	0.201