Effect of Combined Etomidate-Ketamine Anesthesia on Perioperative Electrocardiogram and Postoperative Cognitive Dysfunction of Elderly Patients with Rheumatic Heart Valve Disease Undergoing Heart Valve Replacement

Table 2

Average magnitude of patients’ perioperative ST-T depression and elevation (x ± s, mV).

Group	Combined, n = 50	Ketamine, n = 50	t
ST-T-segment depression
T1	0.15 ± 0.04	0.15 ± 0.05	0.000	1.000
T2	0.12 ± 0.05	0.11 ± 0.06	0.905	0.368
T5	0.14 ± 0.08	0.24 ± 0.10	5.522	<0.001
ST-T-segment elevation
T1	0	0	—	—
T2	0.16 ± 0.05	0.20 ± 0.04	4.417	<0.001
T5	0.12 ± 0.05	0.19 ± 0.07	5.754	<0.001