Original Sgarbossa Criteria
Electrocardiographic Diagnosis of Evolving Acute Myocardial Infarction in the Presence of Left Bundle-Branch Block
N Eng J Med. 1996; 334: 481-7
1.
ST-segment elevation>1 mm and concordant with QRS complex
Score 5
2.
ST-segment depression>1 mm in lead V1, V2, or V3
Score 3
3.
ST-segment elevation>5 mm and discordant with QRS complex
Score 2
Score 3点以上で虚血を疑う。
Derivation sample Sensitivity 78% specificity 90%
Validation sample Sensitivity 36% specificity 96%
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Modified Sgarbossa Rule
Diagnosis of ST-Elevation Myocardial Infarction in the Presence of Left Bundle Branch Block With the ST-Elevation to S-Wave Ratio in a Modified Sgarbossa Rule
Ann Emerg Med. 2012; 60: 766-76
Original ruleの1 or 2に加え、次の基準のどれかを満たせば虚血を疑う。
ST/S ratio < -0.25