Table 1. Clinical characteristics.
| Characteristic | All Patients (n = 185) | Q-wave UMI (n = 15) | Non-Q-wave UMI (n = 50) | No MI (n = 120) | p-Value |
| Age | 60.4±11.2 | 58.5±10.7 | 64.3±11.4 | 59.1±11.0 | 0.02 a |
| Male | 66% | 73% | 74% | 63% | 0.30 |
| CAD risk factors | |||||
| Hypertension | 123 (66%) | 12(80%) | 35 (70%) | 76 (63%) | 0.36 |
| Hypercholesterolemia | 90 (49%) | 7 (47%) | 23 (46%) | 60 (50%) | 0.88 |
| Cigarette smoking | 53 (29%) | 8 (53%) | 16 (32%) | 29 (24%) | 0.052 |
| Diabetes mellitus | 57 (31%) | 5 (33%) | 22 (44%) | 30 (25%) | 0.049 a |
| Family history of CAD | 66 (36%) | 2 (13%) | 16 (30%) | 49 (41%) | 0.07 |
| Number of risk factors | 2.1±1.1 | 2.3±1.3 | 2.2±1.1 | 2.0±1.1 | 0.49 |
| Symptoms | |||||
| Chest painb | 0.74 | ||||
| Typical angina | 57 (31%) | 4 (27%) | 16 (32%) | 37 (31%) | |
| Atypical angina | 57 (31%) | 6 (43%) | 12 (24%) | 39 (33%) | |
| None | 71 (38%) | 5 (36%) | 22 (43%) | 44 (37%) | |
| Dyspnea | 56 (30%) | 4 (27%) | 19 (38%) | 33 (28%) | 0.38 |
| NYHA class | 1.4±0.8 | 1.5±1.0 | 1.7±1.0 | 1.3±0.7 | 0.051 |
| Medications | |||||
| Aspirin | 109 (59%) | 13 (87%) | 32(64%) | 64 (53%) | 0.03 |
| Beta blocker | 74 (40%) | 7 (47%) | 21 (42%) | 46 (38%) | 0.78 |
| ACE-I | 86 (46%) | 7 (47%) | 27 (54%) | 52 (43%) | 0.45 |
| Statin | 65 (35%) | 2 (13%) | 19 (38%) | 44 (37%) | 0.18 |
| Nitrate | 29 (16%) | 6 (40%) | 13 (26%) | 10 (8%) | 0.0004 a |
| Calcium channel blocker | 38 (21%) | 5 (33%) | 16 (32%) | 17 (14%) | 0.01 a |
| Framingham risk score c | 16.2±12.3 | 20.1±13.6 | 22.5±15.3 | 13.5±10.0 | 0.0006 a |
| 12-lead ECG | |||||
| Q-wavesd | 15 (8%) | 15 (100%) | — | — | — |
| Left bundle branch blocke | 10 (5%) | — | 4 (8%) | 6 (5%) | — |
| Cine CMR | |||||
| LVEF | 59±18 | 48±20 | 52±18 | 63±17 | <0.0001 a |
| End diastolic volume, ml | 114±47 | 104±36 | 106±45 | 118±48 | 0.23 |
| End systolic volume, ml | 50±41 | 56±35 | 54±37 | 48±43 | 0.57 |
a
p<0.05 for pairwise comparison between non-Q-wave UMI and no MI.
b
Angina defined by Rose Chest Pain Questionnaire. The p value pertains to the comparison in the distribution of patients according to chest pain.
c
Calculated in the 140 patients who had all relevant blood tests.
d
Minnesota codes 1-1-1 to 1-2-7.
e
Minnesota codes 7-1-1.
ACE-I, angiotensin converting enzyme inhibitor.