| COR | LOE | Recommendations | References |
|---|---|---|---|
| I | B‐NR | 1. In patients undergoing endocardial LV catheter mapping and/or ablation, intraprocedural systemic anticoagulation with intravenous heparin is recommended. | S6.5.1–S6.5.6 |
| I | C‐EO | 2. In patients undergoing RV endocardial mapping and/or ablation who are considered high risk for thromboembolism, intraprocedural systemic anticoagulation with intravenous heparin is recommended. | |
| IIa | C‐LD | 3. In patients undergoing epicardial access after systemic heparinization, reversal of heparin with protamine is reasonable. | S6.5.7, S6.5.8 |
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