Table 2.
Diagnostic coronary angiography and echocardiography findings
| Characteristics | Sleep apnoea (n=513) |
Non-sleep apnoea (n=494) |
P value |
| Coronary angiography | |||
| Clinical presentation, n (%) | 0.22 | ||
| ST–segment elevation myocardial infarction | 60 (11.7) | 49 (9.6) | |
| Non–ST–segment elevation myocardial infarction | 205 (40.1) | 185 (36.1) | |
| Unstable angina | 94 (18.4) | 103 (20.1) | |
| Stable angina | 129 (25.2) | 143 (27.9) | |
| Other | 23 (4.5) | 13 (2.5) | |
| Number of diseased coronary vessels, n (%) | 0.27 | ||
| 1 | 20 (3.9) | 14 (2.8) | |
| 2 | 56 (10.9) | 68 (13.8) | |
| 3 | 437 (85.2) | 412 (83.4) | |
| Left main artery stenosis ≥50% | 155 (30.4) | 157 (31.8) | 0.63 |
| Proximal left anterior descending artery stenosis ≥50% | 379 (74.8) | 368 (74.8) | 0.99 |
| SYNTAX score, median (IQR) | 33 (26–41) | 33 (26–41) | 0.92 |
| Echocardiography | |||
| Left ventricular ejection fraction, median (IQR), % | 50 (37–60) | 55 (45–60) | <0.0001 |
| Left ventricular ejection fraction, n (%) | <0.0001 | ||
| >50% | 223 (48.0) | 264 (61.1) | |
| 30%–50% | 158 (34.0) | 120 (27.8) | |
| <30% | 84 (18.1) | 48 (11.1) | |
| Left atrium diameter, median (IQR), mm | 41 (37–45) | 38 (35–42) | <0.0001 |
| Left ventricular end–diastolic internal diameter, median (IQR), mm | 52 (47–57) | 49 (45–54) | <0.0001 |
| Left ventricular end–systolic internal diameter, median (IQR), mm | 36 (31–44) | 33 (29–39) | <0.0001 |
| Left ventricular mass index, median (IQR), g/m2 | 108 (89–132) | 98 (82–123) | <0.0001 |
| Aortic root diameter, median (IQR), mm | 33 (30–36) | 32 (30–35) | 0.011 |
| E/A, median (IQR) | 0.87 (0.67–1.32) | 0.86 (0.70–1.20) | 0.41 |
| Pulmonary artery systolic pressure, median (IQR), mm Hg | 30 (25–39) | 29 (24–34) | 0.016 |
Data were missing from the categories of clinical presentation (n=3), left main stenosis (n=3) and left anterior descending artery stenosis (n=8). Preoperative echocardiography data were available in 897 of 1007 patients.