Thirty-day complication rates between apical and septal cohorts (n (%))
| Complication at 30 days | Apical group (n=616) | Septal group (n=204) | P value |
| Bleeding/haematoma | 8 (1) | 6 (3) | 0.1 |
| Pneumothorax | 16 (2) | 5 (2) | >0.9 |
| Lead displacement | 6 (1) | 3 (2) | 0.6 |
| Infection | 9 (2) | 3 (2) | >0.9 |
| Cardiac tamponade | 0 (0) | 1 (1) | 0.2 |
| Other* | 7 (1) | 0 (0) | 0.1 |
| Composite periprocedural complication score | 46 (8%) | 18 (9%) | 0.5 |
*Atrial lead dysfunction, right ventricular lead repositioning, right ventricular perforation without tamponade, wound dehiscence, pericarditis and subclavian vein thrombosis.