DSMB recommendation

To assess if ultrasound guided venous puncture reduces the risk for access site complication in the contex of atrial fibrillation ablation.

Inclusion Criteria:

• Inclusion Criteria

  1. Age ≥18 years
  2. Signed written informed consent
  3. Planned transvenous catheter ablation procedure for AF or left atrial tachycardia
  4. Willingness to participate in follow-up

Exclusion Criteria

1. Patient is unable or unwilling to provide informed consent
2. Planned/required arterial access (e.g. for blood pressure monitoring)
3. Patient has contra-indication to oral anticoagulation
4. Known coagulation disorder or Thrombocytopenia <150.000/ul.

6. Women currently pregnant or breastfeeding or women of childbearing potential without highly effective contraception (PEARL-Index < 1%), 7. Patient is included in another clinical trial 8. Inability to comply with the study procedures