Sgarbossa Criteria Flashcards

1
Q

What is meant by the term “discordance?”

A

QRS complex is in the opposite direction of T-wave.

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2
Q

In LBBB, the QRS complex is deeply negative in what leads?

A

V1-V3.

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3
Q

Because of deeply negative QRS waves in leads V1-V3 in the presence of LBBB, what “rule” is used to determine presence of ischemia?

A

Proportion rule:

  • Excessive discordant STE, as defined by ≥ 25% of the depth of the preceding S-wave.
  • STE/QRS depth > 0.25 = No STEMI
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