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Right bundle branch block is not a predictor of coronary artery disease

Amir Farhang Zand Parsa1, Ladan Haghighi

  • 1Department of Cardiology, Imam Khomeini Medical Center, Tehran University of Medical Sciences, Iran. zandparsa@tums.ac.ir

Acta Medica Iranica
|February 24, 2012
PubMed

Insights

Right bundle branch block (RBBB) does not predict coronary artery disease (CAD) presence or severity in suspected CAD patients. However, RBBB may indicate more severe stenosis in the left coronary system, despite no overall association with CAD extent.

Area of Science:

  • Cardiology
  • Diagnostic Imaging
  • Electrocardiography

Background:

  • Right bundle branch block (RBBB) is a known predictor of poor outcomes in acute myocardial infarction.
  • The prognostic value of RBBB in patients with suspected coronary artery disease (CAD) remains unclear.
  • The association between RBBB, CAD incidence, and stenosis severity is not well-established.

Purpose of the Study:

  • To investigate the relationship between RBBB and the presence and severity of CAD in patients with suspected CAD.
  • To assess if RBBB influences the degree of coronary artery stenosis.

Main Methods:

  • Retrospective analysis of 172 patients with RBBB and 174 with normal resting ECG.
  • Coronary artery disease severity quantified using the Gensini score based on angiographic findings.
  • Statistical analysis to determine associations between RBBB, CAD presence, and Gensini score.

Main Results:

  • Prevalence of CAD was 77.3% in the RBBB group versus 70.1% in the normal ECG group (P=0.13).
  • No significant association was found between RBBB and overall Gensini score (OR=0.87, P=0.62).
  • Male gender and diabetes mellitus were associated with higher Gensini scores (P<0.0001 for both).
  • RBBB showed association with increased stenosis severity in the left coronary system (LAD & LCX).

Conclusions:

  • RBBB is not associated with the overall presence or severity of coronary artery disease in patients with suspected CAD.
  • While RBBB may correlate with more severe stenosis in specific left coronary arteries, it does not predict overall CAD burden.
  • Further research is needed to clarify the prognostic implications of RBBB in suspected CAD.

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