Table 6. Distance between the origin of the sinoatrial nodal artery (SANa) and the ostia of the right coronary artery (RCA) and the left circumflex artery (LCX) in different population subgroups.
| Population | Number of studies (Number of RCA / LCX) | Pooled mean, mm (95%CI) | I2 | Cochran’s Q, P-value |
|---|---|---|---|---|
| Distance from the ostium of the RCA to the origin of the SANa | ||||
| All | 18 (3313) | 16.306 (14.134–18.478) | 98.01 | 0.000 |
| Asia | 9 (2516) | 16.308 (12.796–19.819) | 98.99 | 0.000 |
| Europe | 4 (480) | 15.977 (12.178–19.775) | 94.28 | 0.000 |
| South America | 3 (221) | 16.025(14.626–17.424) | 0.00 | 0.542 |
| Cadaveric | 9 (499) | 15.041 (13.270–16.812) | 82.46 | 0.000 |
| Imaging | 9 (2814) | 17.305 (13.918–20.693) | 98.97 | 0.000 |
| Distance from the ostium of the LCX to the origin of the SANa | ||||
| All | 14 (2029) | 14.323 (11.706–16.939) | 98.40 | 0.000 |
| Asia | 7 (1585) | 10.359 (7.746–12.972) | 98.37 | 0.000 |
| Europe | 3 (262) | 20.360 (12.948–27.772) | 92.45 | 0.000 |
| North America | 2 (127) | 20.337 (3.971–36.702) | 98.92 | 0.000 |
| South America | 2 (55) | 14.164 (10.832–17.496) | 0.00 | 0.578 |
| Cadaveric | 5 (112) | 10.867 (6.783–14.951) | 83.24 | 0.000 |
| Imaging | 9 (1917) | 15.893 (12.582–19.203) | 98.59 | 0.000 |
SANa, Sinoatrial nodal artery; RCA, Right coronary artery; LCX, Left circumflex artery