Sgarbossa Criteria Flashcards
1
Q
What is meant by the term “discordance?”
A
QRS complex is in the opposite direction of T-wave.
2
Q
In LBBB, the QRS complex is deeply negative in what leads?
A
V1-V3.
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