Table 2. Clinical and angiographic presentation.
| Patients, n | Total | Type 1 | Type 2A | Type 2B | Type 3 | Type 4 | p-value | |
| 302 (100) | 52 (17.2) | 80 (26.5) | 69 (22.8) | 20 (6.6) | 81 (26.8) | |||
| Clinical presentation | STEMI | 145 (48) | 26 (50) | 33 (41.2) | 21 (30.4) | 7 (35) | 58 (71.6) | <0.001 |
| NSTEMI | 136 (45) | 20 (38.5) | 39 (48.8) | 44 (63.8) | 12 (60) | 21 (25.9) | <0.001 | |
| Angina | 8 (2.7) | 4 (7.7) | 4 (5) | 0 | 0 | 0 | 0.181 | |
| Cardiac arrest | 13 (4.3) | 2 (3.8) | 4 (5) | 4 (5.8) | 1 (5) | 2 (2.5) | 0.409 | |
| Culprit vessel | Left main | 8 (2.6) | 5 (9.6) | 2 (2.5) | 0 | 0 | 1 (1.2) | 0.066 |
| LAD | 164 (54.3) | 26 (50) | 51 (63.8) | 36 (52.2) | 6 (30) | 45 (55.5) | 0.090 | |
| LCX | 77 (25.5) | 10 (19.2) | 18 (22.5) | 18 (26.1) | 13 (65) | 18 (2.2) | 0.004 | |
| RCA | 53 (17.5) | 11 (21.2) | 9 (11.3) | 15 (21.7) | 1 (5) | 17 (20.9) | 0.266 | |
| Multivessel disease (MVD) | 36 (11.9) | 11 (21.2) | 8 (10) | 5 (7.2) | 2 (10) | 10 (12.3) | 0.420 | |
| LAD involved | 25 (69.4 of MVD) | 10 (19.2) | 9 (11.3) | 2 (2.9) | 0 | 4 (4.8) | 0.024 | |
| Angiographic stenosis (%) | 85.7±17.4 | 79.3±17 | 83.2±17.7 | 80.1±20.2 | 79.6±12.1 | 100 | <0.001* | |
| SCAD length (mm) | 40.3±24.3 | 35.2±25.8 | 38.6±18.6 | 52.8±26.2 | 18±7.4 | 37.8±23.4 | <0.001 | |
| OCT use (%) | 43 (14.1) | 8 (15.4) | 16 (20.0) | 7 (10.1) | 6 (30.0) | 6 (7.4) | 0.026 | |
| IVUS use (%) | 48 (16.0) | 9 (17.3) | 13 (16.3) | 5 (7.2) | 4 (20.0) | 17 (20.9) | 0.188 | |
| TIMI flow baseline | 0 | 89 (29.4) | 3 (5.8) | 1 (1.3) | 4 (5.8) | 0 | 81 (100) | <0.001 |
| 1 | 19 (6.3) | 5 (9.6) | 8 (10) | 5 (7.4) | 1 (5) | 0 | 0.809* | |
| 2 | 58 (17.6) | 15 (28.9) | 19 (23.8) | 13 (19.1) | 6 (30) | 0 | 0.458* | |
| 3 | 136 (45.2) | 27 (51.9) | 52 (65) | 44 (64.7) | 13 (65) | 0 | 0.485* | |
| Most proximally affected segment | Proximal | 52 (17.2) | 17 (32.7) | 15 (18.8) | 6 (14.7) | 2 (10) | 12 (15) | 0.012 |
| Medium | 73 (24.2) | 17 (32.7) | 23 (28.8) | 13 (18.8) | 3 (15) | 17 (21) | 0.262 | |
| Distal | 92 (30.5) | 11 (21.2) | 23 (28.8) | 26 (37.7) | 3 (15) | 29 (35.8) | 0.045 | |
| Secondary branches | 85 (28.1) | 7 (13.5) | 19 (23.8) | 24 (34.8) | 12 (60) | 23 (28.4) | <0.001 | |
| Data are presented as means±SDs for continuous variables and numbers (%) for categorical variables. *p-values calculated excluding angiotype 4. IVUS: intravascular ultrasonography; LAD: left anterior descending artery; LCX: left circumflex; NSTEMI: non-ST-elevation myocardial infarction; OCT: optical coherence tomography; RCA: right coronary artery; SCAD: spontaneous coronary artery dissection; STEMI: ST-elevation myocardial infarction | ||||||||