Thromboembolic Complications After Pacemaker or Implantable Cardioverter-Defibrillator Procedures

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT01717495
Recruitment Status : Unknown
Verified May 2013 by Roberto Costa, University of Sao Paulo.
Recruitment status was:  Recruiting
First Posted : October 30, 2012
Last Update Posted : May 7, 2013
Duke University
Information provided by (Responsible Party):
Roberto Costa, University of Sao Paulo

September 30, 2012
October 30, 2012
May 7, 2013
April 2013
April 2014   (Final data collection date for primary outcome measure)
Thromboembolic complications [ Time Frame: Participants will be evaluated at 1, 6, 12 months after the surgical procedure ]
Upper extremity deep venous thrombosis Pulmonary embolism All cause mortality
Same as current
Complete list of historical versions of study NCT01717495 on Archive Site
Venous lesions [ Time Frame: Participants will be evaluated at 12 months after the surgical procedure ]
Venous stenosis (any degree) detected by subtraction venography
Same as current
Not Provided
Not Provided
Thromboembolic Complications After Pacemaker or Implantable Cardioverter-Defibrillator Procedures
Thromboembolic Complications Associated With Pacemaker or Implantable Cardioverter-Defibrillator Procedures: a Prospective Registry
This is a large prospective registry of patients submitted to cardiac electronic devices implantation designed to investigate the incidence, risk factors and prognostic of thromboembolic complications associated with transvenous lead implantation.

More than 235.500 cardiac pacemakers and cardioverter-defibrillators are implanted in the US every year, with an estimated 25,000 new implants in Brazil. Despite its proven clinical effectiveness and efficacy for a number of clinical conditions such as arrhythmias, the number of adverse events in the post-implant period remains substantial. Among these complications, venous obstructions occurs anywhere between 14% and 64% of all patients, causing devastating consequences such as upper extremity deep venous thrombosis and pulmonary embolism, ultimately leading to either significant impairment or death. Although retrospective studies have demonstrated the high incidence of these complications, as a consequence of a paucity of reliable registries we know next to nothing regarding how these venous lesions may influence the clinical outcome and mortality of patients, whether laboratorial markers may contribute to the early diagnosis of venous thrombosis and its complications, and about properties of diagnostic imaging for the identification of thromboembolic complications after permanent transvenous leads implantation.

The objective of this study is therefore to propose a significant improvement in an existing clinical database located within the Heart Institute (INCOR) at the University of Sao Paulo to enable the provision of answers to a clinical, biomarker, and imaging-related research questions. Specifically, our aims are to:

  • Aim 1 - Registry infrastructure: In collaboration with professors from Duke University, we will create a series of improvements to the current database to enable it to serve as a platform not only for the current studies but also for future longitudinal, randomized studies. These include the standardization of variables in accordance with international guidelines, increase in patient retention and the ability to have additional data points in-between clinical appointments, improvement in the determination of cause of mortality, data quality monitoring, the creation of an item bank to measure aspects of quality of life that are specific for this population, as well as the integration of images and biomarkers to the clinical database.
  • Aim 2 - Diagnostic imaging methods: To identify the incidence of upper extremity deep venous thrombosis after cardiac devices implantations or reoperation procedures, as well, the incidence of symptomatic and asymptomatic pulmonary thromboembolism.
  • Aim 3 - Prognostic clinical factors: To study the impact of thromboembolic complications in the clinical prognostic and mortality of patients;
  • Aim 4 - Prognostic biomarkers: To determine the association between the biomarkers related with alterations in the hemostasis system and the occurrence of venous thrombosis (biomarkers: Fibrinogen, D Dimer, Antithrombin, Prothrombin fragment 1 +2, thromboxane B, Platelets, Plasminogen)

At the end of this study we will have a registry with one of the largest number of patients with this condition around the world, fully equipped for future randomized controlled trials. We will also have a much better understanding regarding clinical, imaging, and biomarkers for this condition.

Observational Model: Cohort
Time Perspective: Prospective
Not Provided
Retention:   Samples Without DNA
Blood Fibrinogen, D Dimer, Antithrombin, Prothrombin fragment 1 +2, thromboxane B, Platelets, Plasminogen
Probability Sample
  • Bradyarrhythmias
  • Arrhythmias
  • Cardiovascular Disease
  • Venous Thrombosis
  • Pulmonary Embolism
Not Provided
  • Implantation Procedures
    Patients submitted to initial pacemaker or ICD implantation
  • Reoperation Procedures
    Patients submitted to pacemaker or implantable cardioverter-defibrillator generator replacements, upgrade procedures and lead extraction
Not Provided

*   Includes publications given by the data provider as well as publications identified by Identifier (NCT Number) in Medline.
Unknown status
Same as current
April 2016
April 2014   (Final data collection date for primary outcome measure)

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
Sexes Eligible for Study: All
18 Years to 90 Years   (Adult, Older Adult)
Contact information is only displayed when the study is recruiting subjects
CAPPesq: 0730/11
Not Provided
Not Provided
Roberto Costa, University of Sao Paulo
University of Sao Paulo
Duke University
Principal Investigator: Roberto Costa, MD PhD University of Sao Paulo
Principal Investigator: Katia R Silva, RN PhD University of Sao Paulo
University of Sao Paulo
May 2013