Synthesized 18-Lead Electrocardiogram in Diagnosing Posterior Stemi-Equivalent Acute Coronary Syndrome in Patients with NSTEMI
Table 1
Patient characteristics.
Total n = 219
sV7-9 STE n = 16
No STE n = 203
Baseline characteristics
Age, years
68.8 (11.9)
63.7 (14.3)
69.2 (11.7)
0.07
Men, n (%)
179 (81.7)
12 (75.0)
167 (82.3)
0.70
Body mass index, kg/m2
24.2 (22.1, 26.1)
26.1 (23.4, 28.4)
24.1 (22.1, 25.8)
0.07
Current smoking, n (%)
72 (32.9)
6 (37.5)
66 (32.5)
0.90
Diabetes, n (%)
102 (46.6)
9 (56.2)
93 (46.0)
0.60
Hypertension, n (%)
151 (68.9)
13 (81.2)
138 (68.0)
0.41
Dyslipidemia, n (%)
113 (51.6)
8 (50.0)
105 (51.7)
1.0
Left ventricular EF, %
57.3 (10.0)
60.0 (8.6)
57.2 (10.2)
0.17
Previous MI, n (%)
46 (21.0)
1 (6.2)
45 (22.2)
0.24
Aspirin at baseline, n (%)
62 (28.36)
3 (18.8)
59 (29.1)
0.55
Chest symptom on admission, n (%)
206 (94.1)
16 (100.0)
190 (93.6)
0.62
ECG characteristics
V1-3 STD, n (%)
19 (8.7)
5 (31.2)
14 (6.9)
0.01
V4-6 STD, n (%)
63 (28.8)
3 (18.8)
60 (29.6)
0.57
I, aVL STD, n (%)
12 (5.5)
0 (0)
12 (5.9)
1.0
II, III, aVF STD, n (%)
27 (12.3)
0 (0)
27 (13.3)
0.25
aVR STD, n (%)
1 (3.4)
0 (0)
1 (0.5)
1.0
Synthesized V7-9 STD, n (%)
10 (4.6)
0 (0)
10 (4.9)
1.0
Atrial fibrillation, n (%)
16 (7.3)
0 (0)
16 (7.9)
0.54
Biochemical analysis
hs-cTnI on admission, ng/L
436 (154, 1883)
1055 (380, 6474)
394 (150, 1799)
0.06
NT-proBNP on admission, pg/mL
530 (155, 1829)
263 (150, 1086)
581 (161, 2017)
0.31
Peak hs-cTnI, ng/L
5759 (2060, 19795)
36203 (17255, 93105)
4895 (1913, 15797)
<0.01
Risk assessment on admission
Killip grade, %
0.71
1
195
15 (93.8)
180 (88.7)
2
16 (7.3)
1 (6.2)
15 (7.4)
3
8 (3.7)
0 (0)
8 (3.9)
4
0 (0)
0 (0)
0 (0)
TIMI score
4 (3, 5)
4 (3, 5)
4 (3, 4)
0.18
GRACE score
144 (119, 172)
113 (94, 142)
145 (122, 173)
0.01
Values are n (%) for categorical variables and mean (SD) or median [IQR] for continuous variables. Categorical variables were compared using the chi-square test or Fisher’s exact test. Continuous variables were compared using Student’s t-test or the Mann–Whitney U test, accordingly. STE, ST-segment elevation; STD, ST-segment depression; EF, ejection fraction; MI, myocardial infarction; hs-cTnI, cardiac troponin I; NT-pro BNP, N terminal pro B type natriuretic peptide; TIMI, thrombolysis in myocardial infarction; GRACE, Global Registry of Acute Coronary Events.
