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| Octant | Number of EGM |
|---|---|
| Basal—Septal—Superior (BSS) | 37 |
| Basal—Septal—Inferior (BSI) | 38 |
| Basal—Lateral—Superior (BLS) | 64 |
| Basal—Lateral—Inferior (BLI) | 94 |
| Apical—Septal—Superior (ASS) | 45 |
| Apical—Septal—Inferior (ASI) | 41 |
| Apical—Lateral—Superior (ALS) | 50 |
| Apical—Lateral—Inferior (ALI) | 46 |
