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MI Diagnosis in LBBB or paced rhythm

No change in size, 09:59, 8 October 2014
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*ST elevation > 1mm in leads with a positive QRS complex (concordance in ST deviation) (score 5)
*ST depression > 1 mm in V1-V3 (concordance in ST deviation) (score 3)
*ST elevation > 5 mm in leads with a negative QRS complex (inappropriate discordance in ST deviation) (score 2). This criterium criterion is sensitive, but not specific for ischemia in LBBB. It is however associated with a worse prognosis, when present in LBBB during ischemia.<cite>Wong</cite>
At a score-sum of 3, these criteria have a specificity of 90% for detecting a myocardial infarction.

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