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Updated: Jun 23, 2026

Benefits of Cardiac Resynchronization Therapy in an Asynchronous Heart Failure Model Induced by Left Bundle Branch Ablation and Rapid Pacing
12:45

Benefits of Cardiac Resynchronization Therapy in an Asynchronous Heart Failure Model Induced by Left Bundle Branch Ablation and Rapid Pacing

Published on: December 11, 2017

Prognosis in bundle branch block

J McAnulty, S Rahimtoola

    Annual Review of Medicine
    |January 1, 1981
    PubMed

    Insights

    Chronic bundle branch block (BBBC) in asymptomatic patients requires no intervention. Symptomatic patients with bradyarrhythmia may benefit from a permanent pacemaker if complete heart block is confirmed.

    Area of Science:

    • Cardiology
    • Electrophysiology

    Background:

    • Chronic bundle branch block (BBBC) is a prevalent condition.
    • BBBC often indicates underlying heart disease.

    Purpose of the Study:

    • To outline diagnostic and treatment strategies for patients with chronic bundle branch block.
    • To clarify the role of permanent pacemakers in managing symptomatic versus asymptomatic individuals.

    Main Methods:

    • Review of clinical guidelines and evidence regarding chronic bundle branch block management.
    • Analysis of patient outcomes based on symptom presentation and documented arrhythmias.

    Main Results:

    • Asymptomatic patients with BBBC do not require diagnostic studies or treatment.
    • Symptomatic patients require evaluation for bradyarrhythmia; permanent pacemaker insertion is indicated if complete heart block is documented.
    • Pacemaker insertion in symptomatic patients without documented arrhythmia did not demonstrate benefit in symptom prevention or survival.

    Conclusions:

    • Management of chronic bundle branch block should be stratified based on symptomology and electrophysiological findings.
    • Permanent pacemaker implantation is reserved for symptomatic patients with documented complete heart block.
    • Clinical surveillance is recommended for symptomatic patients without documented arrhythmias.

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