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[Right ventricular diastolic overloading in left bundle-branch block].

B Denis1, P Arnaud

  • 1Clinique Cardiologique, CHU, Grenoble.

Annales De Cardiologie Et D'Angeiologie
|April 1, 1990
PubMed
Summary
This summary is machine-generated.

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Diagnosing right ventricular hypertrophy with left bundle-branch block is rare. This study presents two exceptional cases, highlighting atypical vectorcardiographic findings in patients with these combined cardiac conditions.

Area of Science:

  • Cardiology
  • Electrophysiology
  • Diagnostic Imaging

Background:

  • Left bundle-branch block (LBBB) and right ventricular hypertrophy (RVH) are typically considered mutually exclusive.
  • Previous research suggests LBBB can mask or alter electrocardiographic signs of RVH.
  • The combination poses diagnostic challenges in clinical practice.

Observation:

  • Two rare cases of coexisting LBBB and RVH were identified from approximately 10,000 vectorcardiograms.
  • Both cases exhibited atypical morphology of LBBB.
  • Specific vectorcardiographic criteria proposed by Chou and Helm (1971) for RVH in LBBB were evaluated.

Findings:

  • The first case, associated with a partial atrioventricular canal, met the suggested vectorcardiographic criteria for RVH.

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  • The second case, an ostium secundum defect, did not satisfy these criteria.
  • Both LBBB presentations were highly atypical, deviating from standard patterns.

    • Implications:

    • This study underscores the possibility of diagnosing RVH in the presence of LBBB, challenging prior assumptions.
    • Atypical LBBB morphology may be a key indicator when RVH is suspected.
    • Further research is needed to refine vectorcardiographic criteria for RVH in LBBB patients.