| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| pacemaker of the heart node | 1.65 | 1 | 4548 | 42 |
| what node is the pacemaker of the heart | 1.47 | 0.4 | 833 | 47 |
| which node is the pacemaker of the heart | 1.99 | 0.9 | 165 | 69 |
| pacemaker of the heart is called node | 1.42 | 0.2 | 9871 | 41 |
| sa node pacemaker of the heart | 1.09 | 0.7 | 2436 | 76 |
| which node is the heart's pacemaker | 1.67 | 0.2 | 5633 | 31 |
| why sa node is called pacemaker of heart | 0.13 | 0.6 | 4764 | 65 |
