Asymptomatic Permanent Left Bundle Branch Block (LBBB) complicating Diagnostic Left Heart Catheterisation

Area of Science:

• Cardiology
• Interventional Cardiology

Background:

• Left heart catheterisation is a common diagnostic procedure.
• Complications, though rare, can occur during or after cardiac interventions.

Purpose of the Study:

• To report a case of new-onset permanent left bundle branch block (LBBB) following left heart catheterisation.
• To review the existing literature on LBBB as a complication of this procedure.

Main Methods:

• Case report of a patient undergoing diagnostic left heart catheterisation.
• Post-procedure investigations including ECG, echocardiography, and cardiac biomarkers.
• Literature review for similar reported cases.

Main Results:

• A patient developed asymptomatic, permanent left bundle branch block (LBBB) post-procedure.
• Initial investigations ruled out acute cardiac injury or other immediate causes.
• The patient had underlying two-vessel coronary artery disease and severe mitral regurgitation.

Conclusions:

• Permanent LBBB can be an incidental and permanent complication of left heart catheterisation.
• Further research is needed to understand the incidence and long-term implications of LBBB post-catheterisation.
• This is the first reported case of permanent LBBB after left heart catheterisation.