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ISSN 2078-7170 (Electronic)

2020, Number 3

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CorSalud 2020; 12 (3)

Masquerading bundle branch block

de la Torre FLM, Barreda PAM, Pérez FA, Leyva RH, Ruiz CM

Language: Spanish
References: 11
Page: 343-347
PDF size: 801.20 Kb.


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.


REFERENCES

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