Right bundle-branch block (RBBB) and left bundle-branch block (LBBB) play a role in the pathogenesis and progression of coronary artery disease (CAD). However, the clinical features and the severity of coronary artery disease associated with different subtypes of bundle-branch block, according to time of new appearance, is not well characterized in patients with no known CAD.

中文翻译：

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不同亚型束支传导阻滞的临床特征及冠状动脉粥样硬化的严重程度

右束支传导阻滞（RBBB）和左束支传导阻滞（LBBB）在冠状动脉疾病（CAD）的发病机制和进展中起作用。然而，根据新出现的时间，与不同亚型束支传导阻滞相关的冠状动脉疾病的临床特征和严重程度在没有已知 CAD 的患者中没有得到很好的表征。