Table 3.

Heart rate, mean arterial blood pressure and central venous pressure of patients (Data are presented as mean±SD)

Variable	Group M (n=61)	Group C (n=61)	P
Heart rate (bpm)
T0	76.42±12.57	75.38±11.95	0.640
T1	73.64±11.15	77.80±11.00	0.040*
T2	72.45±10.20	78.17±10.12	0.002*
T3	71.57±9.40	79.30±11.50	0.001*
T4	72.48±9.60	79.60±10.36	0.001*
T5	72.37±10.04	78.10±11.00	0.003*
T6	73.20±10.10	77.55±12.69	0.038*
T7	72.44±10.90	78.06±12.26	0.012*
Mean arterial blood pressure (mmHg)
T0	106.20±15.10	104.70±14.97	0.582
T1	104.30±14.18	109.90±15.70	0.040*
T2	103.17±14.46	110.38±15.08	0.013*
T3	104.66±15.90	112.00±16.20	0.012*
T4	102.94±15.25	111.20±16.10	0.004*
T5	105.40±14.00	114.11±16.50	0.002*
T6	106.22±15.70	113.90±17.40	0.011*
T7	104.50±13.96	115.00±16.80	0.010*
Central venous pressure (mmHg)
T0	9.78±1.61	10.03±1.37	0.357
T1	11.56±1.35	11.80±1.48	0.351
T2	12.20±1.43	12.68±1.60	0.083
T3	12.88±1.44	13.15±1.48	0.309
T4	13.18±1.70	13.72±1.61	0.074
T5	13.47±1.34	13.73±1.44	0.304
T6	13.15±1.25	12.80±1.52	0.167
T7	12.40±1.24	12.67±1.33	0.248

*P<0.05 significant comparison between the two groups.Group M: Magnesium sulphate group; Group C: Control group T0: Baseline reading; T1: 15 minutes after induction; T2: before cardiopulmonary bypass; T3:30 minutes after cardiopulmonary bypass; T4: on ICU admission; T5: 6^th hour after ICU admission; T6: 12^th hour after ICU admission; T7: 24^th hour after ICU admission.