Thromboembolic Complications After Pacemaker or Implantable Cardioverter-Defibrillator Procedures

Inclusion Criteria: * Older than 18 years * Pacemaker/ implantable-cardioverter defibrillator (ICD) / cardiac resynchronization therapy (CRT) initial implant by transvenous approach or * Patients submitted to reoperation procedures, as: pulse generator replacement, implant of an additional lead, lead extraction, lead repositioning; * Subject agreed to participate and signed the consent form Exclusion Criteria: * Patients with a history of venous thromboembolism, coagulopathy or malignancy * Pregnancy * Life expectancy of less than one year * Contraindication to administration of iodinated contrast (creatinine \> 3.0) * Unable to attend the follow-up appointments