Right bundle-branch block unmasking a myocardial infarction

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Summary: A patient with an acute anteroseptal myocardial infarction and intermittent right bundle-branch block is presented. Abnormal Q waves in right precordial leads were only observed during right bundle-branch block. In the absence of right bundle-branch block, depolarization of the right ventricular free wall concealed the abnormal Q waves typical of an anteroseptal infarct. Right bundle-branch block, by preventing early activation of the right ventricular free wall, facilitated the correct diagnosis and localization of the infarction.

Original languageEnglish (US)
Pages (from-to)245-246
Number of pages2
JournalClinical Cardiology
Issue number5
StatePublished - 2002

All Science Journal Classification (ASJC) codes

  • Cardiology and Cardiovascular Medicine


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