LBBB_SGARBOSSA
Technical documentation
Sgarbossa-Smith Criteria (Left Bundle Branch Block)
Modified Sgarbossa-Smith criteria for diagnosing transmural infarction in the presence of LBBB: 1) Concordant ST elevation >= 1 mm in leads with positive QRS (I, aVL, V5, V6); 2) Concordant ST depression >= 1 mm in V1-V3; 3) Excessive discordance with ST/S ratio >= 0.25 in leads with negative QRS (V1-V3).
Also known as: Sgarbossa-Smith Criteria (Left Bundle Branch Block) · criterios de Sgarbossa · Sgarbossa · Sgarbossa-Smith · criterios de Sgarbossa-Smith · Sgarbossa modificados · infarto con bloqueo de rama izquierda · Sgarbossa criteria · modified Sgarbossa criteria · Sgarbossa LBBB
What parameters does the model use?
The following values are applied by the simulation engine to this entity. They govern activation kinematics in the 3D model and the real-time synthesis of the 12-lead electrocardiogram.
What parameters does the model use?
| Parameter | Model value |
|---|---|
| Occlusion severity | Total |
| Compatible territories | LMCA, LAD_VERY_PROX, LAD_PROX, LAD_MID, LCX_PROX, RCA_PROX |
Frequently asked clinical questions
How is Sgarbossa-Smith Criteria (Left Bundle Branch Block) identified on the 12-lead ECG?
Modified Sgarbossa-Smith criteria for diagnosing transmural infarction in the presence of LBBB: 1) Concordant ST elevation >= 1 mm in leads with positive QRS (I, aVL, V5, V6); 2) Concordant ST depression >= 1 mm in V1-V3; 3) Excessive discordance with ST/S ratio >= 0.25 in leads with negative QRS (V1-V3). The characteristic diagnostic waveforms are generated in real time across the simulated 12-lead tracing.
Which leads are critical for diagnostic confirmation?
The primary diagnostic leads are 12 derivaciones. Concordant ST elevation ≥ 1 mm or excessive discordance ST/S ratio ≥ 0.25 (modified Sgarbossa-Smith criteria) in LBBB. In the simulator, these channels highlight the correlation with anatomical vectors.
What is the underlying electrophysiological or anatomical mechanism?
It represents transmural ischemia secondary to occlusion in the territory of the culprit coronary artery.
How can this condition be explored in the 3D simulator?
MioAtlas offers direct deep-link reproducibility with preconfigured parameters, allowing full 3D cardiac rotation and lead vector inspection.
How do you open this configuration?
The simulator encodes its full state in the query string, providing a stable and reproducible URL:
https://mioatlas.com/simulador/en/?syn=SCACEST&ter=LAD_VERY_PROX&phe=LBBB_SGARBOSSA
Related entities
Other entities in the same category within the catalog:
Sources and bibliographic references
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Wagner GS, Macfarlane P, Wellens H, et al. (2009). "AHA/ACCF/HRS recommendations for the standardization and interpretation of the electrocardiogram: Part VI: Acute ischemia/infarction". Circulation.
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Thygesen K, Alpert JS, Jaffe AS, et al. (2019). "Fourth Universal Definition of Myocardial Infarction (2018)". Eur Heart J.
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Rao SV, O'Donoghue ML, Ruel M, et al. (2025). "2025 ACC/AHA/ACEP/NAEMSP/SCAI Guideline for the Management of Patients With Acute Coronary Syndromes". Circulation.