Masquerading bundle branch block as a marker of poor prognosis
Satoshi Kaimoto1, Tatsuya Kawasaki1, Takuya Taniguchi1
1Department of Cardiology, Matsushita Memorial Hospital, 5-55 Sotojima, Moriguchi, Osaka 570-8540, Japan.
Journal of Cardiology Cases
|December 15, 2018
Summary
Masquerading bundle branch block, a rare ECG finding, signals severe conduction system degeneration. This condition indicates a poor prognosis, necessitating close patient monitoring even without symptoms.
Area of Science:
- Cardiology
- Electrophysiology
Background:
- Masquerading bundle branch block (MBBB) is a rare electrocardiogram (ECG) finding.
- It presents as right bundle branch block (RBBB) in precordial leads and left bundle branch block (LBBB) in limb leads.
Purpose of the Study:
- To describe a case of MBBB in a 77-year-old woman.
- To highlight the prognostic implications of MBBB.
Main Methods:
- Case report of a 77-year-old woman diagnosed with MBBB.
- Review of clinical course and outcome.
Main Results:
- The patient with MBBB died suddenly 9 months after diagnosis.
- MBBB was associated with severe conduction system degeneration.
Conclusions:
- MBBB indicates a poor prognosis due to severe conduction system degeneration.
- Close follow-up is mandatory for patients with MBBB, regardless of symptoms.
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