RBBB: Difference between revisions

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[[MI diagnosis in RBBB|Diagnosing myocardial infarction in RBBB]] is not as difficult as in [[LBBB]].
[[MI diagnosis in RBBB|Diagnosing myocardial infarction in RBBB]] is not as difficult as in [[LBBB]].
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==More specific definitions==
A more specific definition of RBBB is given by the ACC/ESC consensus document:
#QRS duration greater than or equal to 120 ms in adults, greater than 100 ms in children ages 4 to 16 years, and greater than 90 ms in children less than 4 years of age.
#rsr′, rsR′, or rSR′ in leads V1 or V2. The R′ or r′ deflection is usually wider than the initial R wave. In a minority of patients, a wide and often notched R wave pattern may be seen in lead V1 and/or V2.
#S wave of greater duration than R wave or greater than 40 ms in leads I and V6 in adults.
#Normal R peak time in leads V5 and V6 but greater than 50 ms in lead V1.
Of the above criteria, the first 3 should be present to make the diagnosis. When a pure dominant R wave with or without a notch is present in V1, criterion 4 should be satisfied.
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==References==
<biblio>
#ESC-ECG pmid=19281930
</biblio>
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