Table 2. Number of the sinoatrial nodal artery (SANa) in different population subgroups.
| Population | Number of studies (Number of hearts) | Single SANa (95% CI) | Double SANa (95% CI) | Triple SANa (95% CI) | I2 (95% CI) | Cochran's Q, P-value |
|---|---|---|---|---|---|---|
| All | 53 (17675) | 95.5 (93.6–96.9) | 4.3 (2.8–6.0) | 0.3 (0–0.7) | 95.77 (95.04–96.38) | 0.000 |
| Africa | 2 (88) | 80.6 (59.1–96.5) | 18.8 (3.5–40.9) | 0.6 (0–6.9) | 79.51 (11.55–95.26) | 0.027 |
| Asia | 17 (8312) | 94.8 (90.0–97.0) | 4.9 (2.2–8.6) | 0.03 (0–1.4) | 97.12 (96.31–97.76) | 0.000 |
| Europe | 24 (8048 | 96.6 (94.2–98.7) | 3.2 (1.3–5.8) | 0.2 (0–1.0) | 96.15 (95.16–96.94) | 0.000 |
| North America | 6 (768) | 95.9 (92.6–98.5) | 3.9 (1.5–7.4) | 0.2 (0–1.2) | 74.77 (42.76–88.88) | 0.001 |
| South America | 4 (459) | 97.0 (93.3–99.5) | 2.6 (0.4–6.2) | 0.5 (0–2.1) | 69.13 (10.87–89.31) | 0.021 |
| Cadaveric | 34 (4690) | 94.9 (91.5–97.2) | 4.6 (2.3–7.7) | 0.5 (0–1.5) | 93.99 (92.51–95.18) | 0.000 |
| Imaging | 19 (12985) | 96.3 (94.0–98.3) | 3.6 (1.7–6.0) | 0.1 (0–0.6) | 97.35 (96.66–97.89) | 0.000 |
| Sensitivity Analysis (n ≥ 100) | 32 (16523) | 96.5 (94.7–98.1) | 3.3 (1.9–5.2) | 0.1 (0–0.6) | 96.99 (96.38–97.50) | 0.000 |
SANa, Sinoatrial nodal artery