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[Right bundle branch block: electrocardiographic and prognostic features]
M Lerecouvreux1, E Perrier, P A Leduc
1Hôpital d'instruction des armées du Val-de-Grâce, 74. bd de Port Royal, 75230 Paris 05. mlerecouvreux@hotmail.com
Archives Des Maladies Du Coeur Et Des Vaisseaux
|January 27, 2006
Summary
Right bundle branch block (RBBB) is an electrocardiogram finding with specific diagnostic criteria. While often benign, RBBB can indicate serious underlying heart conditions, impacting prognosis.
Area of Science:
- Cardiology
- Electrophysiology
Context:
- Right bundle branch block (RBBB) has been recognized since the early 20th century.
- ECG diagnosis of RBBB involves characteristic QRS complex morphology and duration.
Purpose:
- To detail the electrocardiographic (ECG) features of RBBB.
- To discuss differential diagnoses, clinical significance, and prognostic implications of RBBB.
Summary:
- Typical RBBB shows QRS prolongation (>0.12s), specific V1 patterns (RR', rR', Rr'), and widened S waves in left ventricular leads.
- Associated findings like left anterior hemiblock or Brugada syndrome require careful ECG interpretation.
- RBBB's hemodynamic impact is primarily in heart failure or right ventricular dilatation; prognosis is good without underlying disease but poorer with conditions like coronary artery disease.
Impact:
- Accurate ECG interpretation of RBBB aids in diagnosing cardiac conditions.
- Understanding RBBB's prognostic factors is crucial for patient management.
- Distinguishing RBBB from conditions like Brugada syndrome is vital for appropriate treatment and risk stratification.