Congenital or Idiopathic Complete Right Bundle Branch Block: Physiological Significance and Molecular Characterization

September 12, 2005 updated by: National Taiwan University Hospital
This study is to determine 1) the incidence of altered right bundle conduction, including CRBBB, IRBBB or rsR' pattern in the Taipei city based on the school survey databank from 1999 to 2002, 2) the associated cardiac lesions, 3) clinical presentations relevant to the altered right bundle conduction, 4) the association with QTc prolongation and dispersion and HRV from a 5-minutes recording. Finally, molecular characterization for those with CRBBB or Brugada pattern EKG, especially those with positive family history will be studied.

Study Overview

Status

Unknown

Conditions

Detailed Description

The EKG pattern and medical records from the school survey from 1999 to 2002 in Taipei city will be reviewed, and the basic data of those with CRBBB, IRBBB and rsR' pattern will be recorded. Interview will be made and the echocardiographic measurements will be performed to identify associated cardiac defects. EKG parameters and QT, QTc, QT dispersion, QTc dispersion and HRV parameters will be obtained from a semi-automated system. Time domain and frequency domain measures will be calculated and expressed as SDNN, triangular index, SDNN index, total power, low frequency power and high frequency power. Mutational analysis and DNA sequencing will be conducted in those with CRBBB or Brugada pattern EKG, especially those with positive family history.

Based on these data, the clinical significance of altered bundle branch conduction identified from a school survey may be defined. For those with isolated CRBBB or IRBBB, the adjunctive value of HRV and QT parameters will determined the high risk group, and 24 hour Holter recording and Treadmill exercise test will then perform in these patients to define association with ventricular arrhythmia.

Study Type

Observational

Enrollment

50

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact Backup

Study Locations

  • Taiwan
      • Taipei, Taiwan, 100
        • Recruiting
        • Department of Pediatrics, National Taiwan University Hospital
        • Contact:
        • Contact:
      • Taipei, Taiwan, 100
        • Recruiting
        • Pediatric Department, National Taiwan University Hospital
        • Contact:
        • Contact:

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

8 years to 25 years (Child, Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • ECG showed right bundle branch block

Exclusion Criteria:

  • can't tolerate Treadmill ECG study

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

National Taiwan University Hospital

Investigators

  • Study Chair: Mei-Hwan Wu, MD, PhD, National Taiwan University Hospital

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

June 1, 2005

Study Registration Dates

First Submitted

September 12, 2005

First Submitted That Met QC Criteria

September 12, 2005

First Posted (Estimate)

September 15, 2005

Study Record Updates

Last Update Posted (Estimate)

September 15, 2005

Last Update Submitted That Met QC Criteria

September 12, 2005

Last Verified

June 1, 2005

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 9461700620

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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