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Is there an association between left bundle branch block and coronary slow flow in patients with normal coronary

Serdar Biceroglu1, Ahmet Yildiz, Serdar Bayata

  • 1Izmir Gazi Hospital, Izmir, Turkey. sserdarbicer@gmail.com

Angiology
|November 9, 2007
PubMed

Insights

Coronary slow flow in normal arteries is linked to conduction disorders. This study found a strong association, particularly with left bundle branch block, suggesting further research into a causal relationship.

Area of Science:

  • Cardiology
  • Electrophysiology

Background:

  • Slow flow in coronary arteries with normal angiography is a recognized clinical issue.
  • The relationship between coronary slow flow and cardiac conduction disorders remains unclear.
  • Microvascular dysfunction is a proposed cause for coronary slow flow.

Purpose of the Study:

  • To investigate the frequency of conduction disorders in patients presenting with coronary slow flow and angiographically normal coronary arteries.
  • To determine if there is an association between left bundle branch block (LBBB) or right bundle branch block (RBBB) and coronary slow flow.

Main Methods:

  • Analysis of 12-lead electrocardiograms (ECG) in 36 patients diagnosed with coronary slow flow.
  • Assessment for the presence of bundle branch blocks (BBB) and intraventricular conduction delays.
  • Coronary angiography was used to confirm normal coronary arteries and diagnose slow flow.

Main Results:

  • Left bundle branch block (LBBB) was identified in 61% of patients (22 out of 36).
  • Normal intraventricular conduction was observed in 33% of patients (12 out of 36).
  • Right bundle branch block (RBBB) was present in only 6% of patients (2 out of 36).

Conclusions:

  • A significant association exists between coronary slow flow and conduction abnormalities, especially LBBB.
  • The findings suggest a potential link beyond microvascular disease, warranting further investigation into causality.
  • Future studies should explore a direct causal relationship between LBBB and coronary slow flow.

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