Identification of Gene Polymorphism in Patients With Sick Sinus Syndrome in Chinese Population in Taiwan

April 12, 2006 updated by: China Medical University Hospital

Background: Sinus node dysfunction is a major cause of bradycardia necessitating pacemaker implantation. Evidences of genetic study supported that some genes involved in the pacemaker current or renin-angiotensin system were related to sinus node dysfunction. However, the influence of gene polymorphisms on sinus node dysfunction was not well studied.

Methods: A group of 100 patients with documented sinus node dysfunction and 100 age- and sex- matched healthy control patients will be enrolled into this study. Gene polymorphism study includes the angiotensin-I converting enzyme gene, angiotensin II type 1 receptor gene, HCN1-4, SCN5A, KCNE and other possible gene polymorphisms which are related to sinus node function based on previous reports. Genetic polymorphisms are identified with polymerase chain reaction-based restriction analysis. Comparison of multiple haplotype analysis and single-locus analysis will be analyzed between the cases and controls.

Estimated Results: Some genetic polymorphisms of these genes which are related to sinus node function or rennin-angiotensin system will show association with sinus node dysfunction. In multilocus haplotype analysis, some genetic haplotype profiles may demonstrate significant difference between cases and controls. In single locus analysis, some genetic polymorphisms may be associated with sinus node dysfunction.

Estimated Conclusion and Clinical Implication: This study will demonstrate the genetic polymorphisms in RAS genes or some other genes associated with sinus node dysfunction. These results will support the roles of these genetic polymorphisms in determining the risk of sinus node dysfunction among the Chinese population in Taiwan.

Study Overview

Status

Unknown

Conditions

Study Type

Observational

Enrollment

300

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 Locations

  • Taiwan
      • Taichung, Taiwan
        • Recruiting
        • China Medical University Hospital
        • Contact:
          • Cheng-Chieh. Lin, MD
          • Phone Number: 886-4-22052121

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

1 second and older (Child, Adult, Older Adult)

Accepts Healthy Volunteers

Yes

Genders Eligible for Study

All

Description

Inclusion Criteria:

  1. Heart rate was less than 40/min or long pause more than 3 seconds in series EKG or 24-hour EKG.
  2. Sinus nodal recovery time exceeds 1600 ms in cardiac electrophysiology study.

Exclusion Criteria:

  1. Severe systemic disease.
  2. Acute coronary syndrome.
  3. Bradycardia with reversible cause.

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

China Medical 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

February 1, 2006

Study Completion

December 1, 2006

Study Registration Dates

First Submitted

April 12, 2006

First Submitted That Met QC Criteria

April 12, 2006

First Posted (Estimate)

April 13, 2006

Study Record Updates

Last Update Posted (Estimate)

April 13, 2006

Last Update Submitted That Met QC Criteria

April 12, 2006

Last Verified

April 1, 2006

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • DMR94-IRB-167

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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