Masquerading bundle branch block

Authors

  • Luis M. de la Torre Fonseca Hospital Clínico Quirúrgico Docente Manuel Fajardo
  • Ana M. Barreda Pérez
  • Anabel Pérez Fernández
  • Helen Leyva Rivero
  • Mónica Ruiz Carmenaty

Abstract

Masquerading bundle branch block is a rare form of bifascicular block, whose exact mechanism is unknown. It is more frequently found in elderly patients or those with structural heart disease such as: coronary artery disease, ventricular hypertrophy, cardiomyopathies, Chagas myocarditis and idiopathic degeneration of the cardiac conduction system. Its electrocardiographic diagnosis is obtained by the presence of high and wide R waves in V1 (right bundle branch block pattern), left axis deviation (between -80 and -120 degrees) and an S wave of less than 1 mm or absent in I and aVL leads. Its presence denotes a poor prognostic factor in patients.

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Author Biography

Luis M. de la Torre Fonseca, Hospital Clínico Quirúrgico Docente Manuel Fajardo

Especialista de 1er grado en Cardiología. Unidad de Cuidados Intensivos. Hospital Manuel Fajardo.

References

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Published

2020-07-11

How to Cite

1.
de la Torre Fonseca LM, Barreda Pérez AM, Pérez Fernández A, Leyva Rivero H, Ruiz Carmenaty M. Masquerading bundle branch block. CorSalud [Internet]. 2020 Jul. 11 [cited 2025 Jun. 21];12(3):343-7. Available from: https://revcorsalud.sld.cu/index.php/cors/article/view/414

Issue

Vol. 12 No. 3 (2020)

Section

CASE REPORTS

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