Table 2. Door-to-balloon time and other parameters of the 272 patients with ST-segment elevation acute myocardial infarction undergoing primary percutaneous coronary intervention.
| Tele-ECG group (n = 102) | Control group (n = 170) | p value | |
| Prehospital on-scene time (hours) | 2.8 (1-11) | 4.8 (1-10) | 0.22 |
| D2BT_min, median (IQR) | 79 (62-95) | 109 (70-121) | < 0.001 |
| D2BT ≤ 90 minutes goal | 79 (78%) | 93 (55%) | < 0.001 |
| Parameters at presentation | |||
| SBP (mmHg) | 134 ± 33 | 135 ± 29 | 0.825 |
| DBP (mmHg) | 82 ± 22 | 83 ± 19 | 0.642 |
| Heart rate (beats per minute) | 74 ± 17 | 78 ± 22 | 0.208 |
| WBC (/μl) | 10,588 ± 3,033 | 10,833 ± 3,600 | 0.566 |
| Neutrophil (%) | 64 ± 17 | 69 ± 14 | 0.008 |
| Lymphocyte (%) | 28 ± 14 | 23 ± 13 | 0.008 |
| NLR | 3.6 ± 3.5 | 4.7 ± 3.9 | 0.03 |
| Creatinine (mg/dl) | 1.2 ± 1 | 1.3 ± 1 | 0.429 |
| Glucose (gm/dL) | 178 ± 81 | 178 ± 93 | 0.95 |
| Cholesterol (mg/dl) | 176 ± 46 | 179 ± 42 | 0.6 |
| Triglyceride (mg/dl) | 146 ± 136 | 135 ± 92 | 0.433 |
| Initial total CK (μ/ml) | 501 ± 793 | 848 ± 1,468 | 0.029 |
| Initial CK-MB (μ/ml) | 26 ± 49 | 54 ± 93 | 0.01 |
| Initial troponin I | 7 ± 17 | 12 ± 25 | 0.124 |
| GRACE score | 133 ± 32 | 139 ± 34 | 0.182 |
| LV ejection fraction (%) | 43 ± 10 | 42 ± 11 | 0.639 |
| Mitral regurgitation severity | 1.1 ± 0.5 | 1.2 ± 0.7 | 0.012 |
| Peak CK (μ/ml) | 2,773 ± 2,127 | 2,424 ± 2,294 | 0.213 |
| Peak CK-MB (μ/ml) | 127 ± 114 | 130 ± 128 | 0.865 |
| Peak troponin I (μ/ml) | 100 ± 111 | 74 ± 97 | 0.044 |
CK, creatinine kinase; CK-MB, creatinine kinase MB isoenzyme; DBP, diastolic blood pressure; D2BT, door-to-balloon time; ECG, electrocardiography; GRACE, Global Registry of Acute Coronary Events; IQR, interquartile range; LV, left ventricle; NLR, neutrophil-to-lymphocyte ratio; SBP, systolic blood pressure; WBC, white blood cell.