Table 2.
Clinical presentations and diagnostic evaluations by ACS subtype.
| Variables | STEMI (n = 111) | NSTE-ACS (n = 70) | Total (N = 181) | p-value |
|---|---|---|---|---|
| Presentations | ||||
| Symptom onset to admission (h)a | 26 (8–48) | 26.5 (12–40) | 26 (10–43) | 0.925 |
| <12 h, n (%) | 40 (36.0) | 19 (27.1) | 59 (32.6) | 0.241 |
| ≥12 h, n (%) | 71 (64.0) | 51 (72.9) | 122 (67.4) | |
| Symptom at arrival, n (%) | ||||
| Typical angina pain | 73 (65.3) | 40 (57.1) | 113 (62.4) | 0.243 |
| Atypical presentation | 31 (27.9) | 34 (48.6) | 65 (35.9) | |
| Heart rate (bpm)b | 91.6 ± 21.7 | 92.5 ± 27.7 | 92.0 ± 24.1 | 0.966 |
| Systolic BP (mmHg)b | 130.3 ± 30.6 | 129.7 ± 26.2 | 129.7 ± 29.2 | 0.888 |
| Creatinine > 2 mg/dl, n (%) | 16 (14.4) | 9 (12.8) | 25 (13.8) | 0.767 |
| Killip class > II, n (%) | 33 (29.7) | 10 (14.3) | 36 (23.8) | 0.017* |
| GRACE risk score, n (%) | ||||
| Low | 45 (50.0) | 35 (40.5) | 80 (44.2) | 0.458 |
| Intermediate | 42 (31.4) | 22 (37.8) | 64 (35.4) | |
| High | 24 (18.6) | 13 (21.6) | 37 (20.4) | |
| Key investigation, n (%) | ||||
| Positive cardiac biomarkers | 89 (80.2) | 42 (60) | 131 (72.4) | <0.001* |
| Diagnostic angiogram | 52 (46.8) | 27(38.6) | 79 (43.6) | 0.274 |
| Ejection fraction <40% | 42 (37.8) | 28 (40.0) | 70 (38.7) | 0.771 |
IQR, interquartile range; NSTE-ACS, non-ST-segment elevation acute coronary syndrome; STEMI, ST-segment elevation myocardial infarction; GRACE, Global Registry of Acute Coronary Events.
*
p < 0.05 (statistically significant).
a
Expressed as median and interquartile range.
b
Expressed as mean and standard deviations.