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Bundle branch block and nonspecific intraventricular conduction delay prevalence using Chinese nationwide survey data

Qing Qiao1, Jing Lin1, Ning Chen1

  • 1Beijing Anzhen Hospital, Capital Medical University, National Clinical Research Center for Cardiovascular Diseases, Beijing, China.

The Journal of International Medical Research
|August 29, 2022
PubMed

Insights

This study found the prevalence of intraventricular conduction disturbances like left bundle branch block (LBBB) and right bundle branch block (RBBB) in Chinese adults over 45. Age and diabetes were linked to LBBB, while RBBB was associated with age and sex.

Area of Science:

  • Cardiology
  • Epidemiology
  • Public Health

Background:

  • Intraventricular conduction disturbances are common cardiovascular issues.
  • Understanding their prevalence and associated factors in diverse populations is crucial for public health strategies.

Purpose of the Study:

  • To determine the prevalence of left bundle branch block (LBBB), right bundle branch block (RBBB), and nonspecific intraventricular conduction delay (NS-IVCD) in the Chinese population.
  • To identify factors independently associated with these conduction disturbances.

Main Methods:

  • Retrospective analysis of electrocardiographic data from 42,031 individuals.
  • Calculation of weighted prevalences for LBBB, RBBB, bifascicular block, and NS-IVCD.
  • Logistic regression analysis to determine independently associated factors.

Main Results:

  • Weighted prevalence in Chinese adults >45 years: LBBB 0.17%, RBBB 2.16%, NS-IVCD 0.44%.
  • Prevalence of LBBB and RBBB increased with age; RBBB and NS-IVCD showed significant sex-based differences.
  • Independent factors: Age and diabetes for LBBB; age and sex for RBBB; sex and coronary artery disease for NS-IVCD.

Conclusions:

  • This study provides robust data on the prevalence of LBBB, RBBB, and NS-IVCD in Chinese adults.
  • Identified key demographic and clinical factors associated with these conduction abnormalities, aiding targeted interventions.
Abstract

Keywords:
Bundle branch blockChinese adultassociated factornonspecific intraventricular conduction delayprevalenceregression analysis

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