Table 1.
General and subgroup clinical characteristics of patients with acute coronary syndrome, excluding prehospital deaths (n = 583)
| All patients (n = 583) | STEMI (n = 204) | NSTEMI (n = 73) | Unstable angina (n = 306) | |
|---|---|---|---|---|
| Age (years) | 63 ± 12 | 62 ± 13 | 63 ± 12 | 63 ± 11 |
| Male gender | 138 (67.6) | 138 (67.6) | 44 (60.3) | 165 (53.9) |
| Municipality of provenance | ||||
| Montes Claros | 250 (42.9) | 72 (35.3) | 24 (32.9) | 154 (50.3) |
| Other 88 municipalities | 333 (57.1) | 132 (64.7) | 49 (77.1) | 152 (49.4) |
| Patient’s provenance | ||||
| Hospital or outpatient clinic in another municipality* | 264 (45.3) | 117 (57.4) | 39 (53.4) | 109 (35.6) |
| Spontaneous demand | 229 (39.2) | 52 (25.5) | 19 (26.0) | 159 (52.0) |
| Prehospital service | 49 (8.4) | 21 (10.3) | 11 (15.1) | 16 ( 5.2) |
| Hospital or outpatient clinic in Montes Claros† | 40 (6.9) | 14 (6.9) | 4 (5.4) | 22(7.1) |
| Type of transportation‡ | ||||
| Own vehicle | 229 (39.2) | 51 (25.0) | 18 (24.7) | 155 (50.7) |
| Prehospital ambulance service | 173 (29.7) | 100 (49.1) | 27 (37.0) | 46 (15.0) |
| Ambulance or municipality health vehicle | 166 (28.5) | 53 (25.9) | 27 (37.0) | 86 (28.1) |
| Municipality bus | 15 (2.6) | - | 1 (1.4) | 19 (6.2) |
| Comorbidities and risk factors | ||||
| Hypertension | 462 (79.2) | 153 (75) | 54 (74.0) | 255 (83.3) |
| Dyslipidemia | 255 (43.7) | 69 (33.8) | 31 (42.5) | 155 (50.7) |
| Smoking | 116 (19.9) | 53 (26.0) | 19 (26.0) | 44 (14.4) |
| DM | 139 (23.8) | 47 (23.0) | 18 (24.7) | 74 (24.2) |
| - DM, insulin use | 44 (7.5) | 13 (6.4) | 5 (6.8) | 26 (8.6) |
| Previous use of aspirin | 252 (43.2) | 58 (28.4) | 28 (38.9) | 166 (54.2) |
| Previous stroke | 39 (6.7) | 11 (5.4) | 4 (5.5) | 24 (7.8) |
| Positive family history | 235 (40.3) | 73 (35.8) | 30 (41.1) | 132 (43.1) |
| History of coronary disease | 134 (23.0) | 24 (11.8) | 13 (17.8) | 96 (31.4) |
| - Previous angioplasty | 91 (15.6) | 20 (9.8) | 8 (11.0) | 62 (20.3) |
| - Coronary artery bypass grafting | 43 (7.4) | 4 (2.0) | 5 (6.8) | 34 (11.1) |
| Chagas disease | 51 (8.7) | 13 (6.4) | 9 (12.3) | 29 (9.5) |
| Alcoholism | 139 (23.9) | 51 (25.0) | 15 (20.5) | 73 (23.9) |
| Prior MI | 98 (16.8) | 33 (16.2) | 9 (12.3) | 56 (18.3) |
| - Recent | 21 (3.6) | 10 (4.9) | 2 (2.7) | 9 (2.9) |
| - Remote | 77 (13.2) | 23 (11.3) | 7 (9.6) | 47 (15.4) |
| Angiographic data* | ||||
| Location of the culprit lesion | ||||
| - Anterior descending | 210/511 (41.1) | 98/194 (50.5) | 24/70 (34.3) | 88/247 (35.6) |
| - Right coronary artery | 112/511 (21.9) | 67/194 (34.5) | 14/70 (20.0) | 31/247 (12.6) |
| - Circumflex | 76/511 (14.9) | 26/194 (13.4) | 21/70 (30.0) | 29/247 (11.7) |
| - Arterial or venous graft | 6/511 (1.2) | - | 1/70 (1.4) | 5/247 (2.0) |
| - Without significant obstruction (< 50%) | 107/511 (20.9) | 3/194 (1.5) | 10/70 (14.3) | 94/247 (38.0) |
| Pre-procedure TIMI flow | ||||
| - TIMI 0 | 150/511 (29.4) | 139/194 (71.6) | 11/70 (15.7) | - |
| - TIMI 1 | 74/511 (14.5) | 27/194 (13.9) | 15/70 (21.4) | 32/247 (13.0) |
| - TIMI 2 | 97/511 (19.0) | 17/194 (8.8) | 17/70 (24.3) | 66/247 (26.7) |
| - TIMI 3 | 187/511 (36.6) | 11/194 (5.7) | 27/70 (38.6) | 149/247 (60.3) |
| Other vessels with lesions ≥ 70% besides the culprit artery | ||||
| - One | 116/511 (22.7) | 51/194 (26.3) | 14/70 (19.7) | 51/247 (20.6) |
| - Two | 123/511 (24.0) | 64/194 (33.0) | 16/70 (22.5) | 43/247 (17.4) |
| - Three | 39/511 (7.6) | 14/194 (7.2) | 8/70 (11.3) | 17/247 (6.9) |
| Angioplasty with stent implantation | 250/511 (48.9) | 148/194 (76.3) | 31/70 (44.3) | 71/247 (28.7) |
| Angiographic post-procedure success† | 211/250 (84.4) | 114/148 (77.0) | 27/31 (90.0) | 70/71 (98.6) |
| Hospitalization | ||||
| - Length of hospitalization (days) | 7 (4-14) | 9 (6-16) | 10 (7-18) | 6 (4-12) |
| - In-hospital death | 55 (9.4) | 35 (17.2) | 5 (6.8) | 15 (4.9) |
| - Time from hospitalization to death (days) | 9 (2-19) | 3 (1-15) | (8-30) | 19 (8-34) |
*
Three of the 73 patients with NSTEMI, 59 of the 206 patients with unstable angina, and 10 patients with STEMI did not undergo angiography.
†
TIMI 3 flow was considered an angiographic success. STEMI: ST-elevation myocardial infarction; NSTEMI: non-ST-elevation myocardial infarction; DM: diabetes mellitus; MI: myocardial infarction.