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Intraventricular Conduction: Difference between revisions
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→Left Posterior Fasicular Block (LPFB)
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{{Box| | {{Box| | ||
;Criteria for posterior fascicular block: | ;Criteria for posterior fascicular block: | ||
#Frontal plane axis between 90° and 180° in adults. Owing to the more rightward axis in children up to 16 years of age, this criterion should only be applied to them when a distinct rightward change in axis is documented. | |||
#rS pattern in leads I and aVL. | |||
#qR pattern in leads III and aVF. | |||
#QRS duration less than 120 ms. | |||
:Right ventricular [[hypertrophy]] and previous [[Ischemia#Lateral|lateral myocardial infarction]] have been excluded | :Right ventricular [[hypertrophy]] and previous [[Ischemia#Lateral|lateral myocardial infarction]] have been excluded | ||
}} | }} | ||
==Mechanisms of aberrant conduction== | ==Mechanisms of aberrant conduction== | ||
[[Image:E000573.jpg|Rate dependant left bundle branch aberration|thumb]] | [[Image:E000573.jpg|Rate dependant left bundle branch aberration|thumb]] | ||