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Sponsored by: |
National Taiwan University Hospital |
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Information provided by: | National Taiwan University Hospital |
ClinicalTrials.gov Identifier: | NCT00173342 |
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.
Condition |
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Bundle-Branch Block |
Study Type: | Observational |
Study Design: | Screening, Cross-Sectional, Defined Population, Prospective Study |
Official Title: | Congenital or Idiopathic Complete Right Bundle Branch Block: Physiological Significance and Molecular Characterization |
Estimated Enrollment: | 50 |
Study Start Date: | June 2005 |
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.
Ages Eligible for Study: | 8 Years to 25 Years |
Genders Eligible for Study: | Both |
Accepts Healthy Volunteers: | No |
Inclusion Criteria:
Exclusion Criteria:
Contact: Mei-Hwan Wu, MD, PhD | 886-2-23123456 ext 5126 | mhwu@ha.mc.ntu.edu.tw |
Contact: Shuenn-Nan Chiu, MD | 886-2-23123456 ext 5126 | michael@ha.mc.ntu.edu.tw |
Taiwan | |
Pediatric Department, National Taiwan University Hospital | Recruiting |
Taipei, Taiwan, 100 | |
Contact: Shuenn-Nan Chiu, MD 886-2-23123456 ext 5126 michael@ha.mc.ntu.edu.tw | |
Contact: Mei-Hwan Wu, MD, PhD 886-2-23123456 ext 5126 mhwu@ha.mc.ntu.edu.tw | |
Department of Pediatrics, National Taiwan University Hospital | Recruiting |
Taipei, Taiwan, 100 | |
Contact: Mei-Hwan Wu, MD, PhD 886-2-23123456 ext 5126 mhwu@ha.mc.ntu.edu.tw | |
Contact: Shuenn-Nan Chiu, MD 886-2-23123456 ext 5126 michael@ha.mc.ntu.edu.tw |
Study Chair: | Mei-Hwan Wu, MD, PhD | National Taiwan University Hospital |
Study ID Numbers: | 9461700620 |
Study First Received: | September 12, 2005 |
Last Updated: | September 12, 2005 |
ClinicalTrials.gov Identifier: | NCT00173342 |
Health Authority: | Taiwan: Department of Health |
Right bundle branch block Electrocardiography Ion channel |
Bundle-Branch Block Heart block progressive, familial Heart Diseases Heart Block Arrhythmias, Cardiac |
Pathologic Processes Cardiovascular Diseases |