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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]]. | ||
{{clr}} | {{clr}} | ||
==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. | |||
{{Box| | |||
==References== | |||
<biblio> | |||
#ESC-ECG pmid=19281930 | |||
</biblio> | |||
}} | |||