Masquerading bundle branch block: A poor prognostic sign revisited

Suheil Dhanse, Hashir Kareem, Tom Devasia, Mugula Sudhakar Rao

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


Masquerading bundle branch block is a rare but important finding on the Electrocardiogram (ECG). It is an indication of severe and diffuse conduction system disease and usually indicates poor prognosis. The precordial leads show a Right Bundle Branch Block (RBBB) pattern while the limb leads resemble a Left Bundle Branch Block (LBBB). This finding on an ECG is almost invariably associated with severe underlying heart disease. It is extremely important to be aware of this finding as it is a marker of poor cardiac outcomes. We report the case of a 68-year-old gentleman, who presented with progressive dyspnoea on exertion over three months. ECG showed a broad QRS complex with a RBBB pattern on the precordial leads and a LBBB pattern on the limb leads (suggestive of masquerading bundle branch block). A coronary angiogram revealed severe Triple Vessel Disease (TVD). The patient was scheduled for an early Coronary Artery By-Pass Grafting Surgery. However, his clinical condition deteriorated and he died while awaiting the surgery.

Original languageEnglish
Pages (from-to)OD01-OD02
JournalJournal of Clinical and Diagnostic Research
Issue number9
Publication statusPublished - 01-09-2016

All Science Journal Classification (ASJC) codes

  • Clinical Biochemistry


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