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Criteria for LBBB RBBB LAFB LPFB #Diagnosis #EM #IM #Cardiology #EKG #RBBB #LBBB #Criteria #LAFB #LPFB
Criteria for LBBB ... RBBB LAFB LPFB ... #Diagnosis #EM # ... IM #Cardiology # ... EKG #RBBB #LBBB
Here’s an ECG of a patient with 100% Acute LAD Occlusion

Remember that RBBB normally has ST
Remember that RBBB ... So ANY ST Elevation ... STEMI Criteria misses ... #EKG #Electrocardiogram ... #Clinical #Cardiology
Differential Diagnosis for ST Segment Elevations
 - ACUTE STEMI 
 - PULMONARY EMBOLISM 
 - LBBB
Differential Diagnosis ... EMBOLISM - LBBB ... #STSegment #STElevation ... #STEMI #Differential ... #Diagnosis #Cardiology
Modified Sgarbossa Criteria - Diagnostic Checklist for diagnosing MI in LBBB or Pacemaker
1) Identify LBBB or
1) Identify LBBB ... or Pacemaker LBBB ... - Suspect STEMI ... #Checklist #EKG ... #cardiology #lbbb
The modified Sgarbossa Rule uses proportions to identify acute AMI in the setting of ST-elevations in
ST-elevations in LBBB ... - Ratio of ST-elevation ... indicative of acute MI #Diagnosis ... #EM #Cardiology ... Modified #Sgarbossa #Criteria
Modified Sgarbossa Criteria for diagnosing STEMI in the presence of a LBBB If there is concordant
STEMI in the presence ... of a LBBB If there ... discordant ST elevation ... #Cardiology #Sgarbossa ... #LBBB
Approach to ECGs - Ischemia
MI = Biomarkers + ECG or echo/angiogram findings
Pathologic Q - 1/3 height
new/old infarct STEMI ... in V1, unless LBBB ... #EKG #diagnosis ... electrocardiogram #cardiology ... Interpretation #differential
STEMI Equivalents on ECG
 • Conventional STEMI - Elevation of ST segment at (or 40-60 ms
STEMI - Elevation ... • Sgarbossa criterion ... #EKG #diagnosis ... #differential # ... cardiology #electrocardiogram
Causes of ST Segment Elevation - Differential Diagnosis Framework

STEMI:
 • Upsloping convex STE: "Pardee's sign" +
- Differential ... morphology similar to LBBB ... blocking drugs #STElevation ... #Elevation #differential ... #diagnosis #cardiology