Prevalence and Characteristics of Chronic Bifascicular Block in the General Population

DOI Web Site
  • Matsuo Shiro
    JA Medical Checkup Center Atsugi, Kanagawa Prefectural Welfare Federation of Agricultural Cooperatives
  • Noda Yoshikazu
    JA Medical Checkup Center Atsugi, Kanagawa Prefectural Welfare Federation of Agricultural Cooperatives
  • Nakayasu Kunio
    JA Medical Checkup Center Atsugi, Kanagawa Prefectural Welfare Federation of Agricultural Cooperatives
  • Yokoyama Takeyoshi
    JA Medical Checkup Center Atsugi, Kanagawa Prefectural Welfare Federation of Agricultural Cooperatives
  • Honma Tomomi
    JA Medical Checkup Center Atsugi, Kanagawa Prefectural Welfare Federation of Agricultural Cooperatives

Bibliographic Information

Other Title
  • 健康診断受診者における2枝ブロックの有病率とその特徴
  • ケンコウ シンダン ジュシンシャ ニ オケル 2 シ ブロック ノ ユウビョウリツ ト ソノ トクチョウ

Search this article

Abstract

<p>Objective: A bifascicular block (BFB) is a preclinical stage of a complete atrioventricular block and is frequently accompanied by structural and/or ischemic heart disease; therefore, a BFB is usually associated with a high mortality risk. However, patients with chronic BFB frequently present without any history of cardiac events during medical checkups. We investigated the prevalence and characteristics of BFBs.</p><p>Methods: We investigated 41,303 individuals who underwent electrocardiography at the JA Kanagawa Medical Checkup Center during 2021. We defined BFB as a complete right bundle branch block accompanied by a left anterior or posterior hemiblock.</p><p>Results: We identified 110 patients with BFB, of whom 82.0% were men. The overall prevalence was 0.27%, with prevalence of 0.40% in men and 0.11% in women. Patients’ median age was 65 years, and disease duration was three or more years. Only three cardiac events were observed during this period. Twelve patients (11.0%) had underlying heart disease; five had structural heart disease (5.0%), two had ischemic heart disease (2.0%), two had progressive cardiac conduction defects (2.0%), and three had arrhythmias (3.0%).</p><p>Conclusions: The prevalence of BFBs was 0.27% in the general population. However, most patients denied a history of cardiac events, and only 11.0% of patients had underlying heart disease. These findings are inconsistent with those reported by previous studies that included data obtained from hospitalized patients.</p>

Journal

Keywords

Details 詳細情報について

Report a problem

Back to top