2306 results
Stimulated
SA node
AV node -
Un-stimulated
#PQ
(mV) 0
ECG (lead II)
QRS
#QRS
#SA node
#AV node
#Bundle of His
Bundle branches
#Purkinje fibers
#QRS
#ST
Un-stimulated #PQ ... fibers #QRS #ST
ECG characteristics in Brugada Syndrome
 a. Broad P wave with some PQ prolongation
 b. J point
wave with some PQ ... Coved type ST segment
Left Main Coronary Artery Occlusion on ECG

- aVR ST segment elevation > 1 mm 
- aVR
on ECG - aVR ST ... > 1 mm - aVR ST ... segment elevation > ST
STEMI Equivalents on ECG
 • Conventional STEMI - Elevation of ST segment at (or 40-60 ms
- Elevation of ST ... and upsloping ST ... often with 1-2 mm ST ... Posterior STEMI - ST ... criterion 1 - ST
ST segment elevation in acute myocardial ischemia

ST segment elevations with straight (horizontal, upsloping or downsloping) or
ST segment elevation ... myocardial ischemia ST ... downsloping) or convex ST ... Concave ST segment ... Concave ST segment
Sgarbossa Criteria A - Concordant ST segment elevation of >1m, in any lead | Sgarbossa Criteria
A - Concordant ST ... B - Concordant ST ... Disconcordant ST
What are the original Sgarbossa Criteria?
- Concordant ST-segment elevation ≥ 1 mm in any lead =
- Concordant ST-segment ... points - Concordant ST-segment ... points - Discordant ST-segment
De Winter T Wave ECG Pattern 
STEMI Equivalent - Left anterior descending (LAD) occlusion 

1) Upsloping
1) Upsloping ST ... (>= 1 mm) 2) ST
Progression of EKG changes in ACS
 • Hyperacute T waves
 • ST depression and T waves
Hyperacute T waves • ST ... waves changes • ST
Causes of ST Segment Elevation - Differential Diagnosis Framework

STEMI:
 • Upsloping convex STE: "Pardee's sign" +
Causes of ST Segment ... Opposing leads ST ... in V4 - The ST ... - Reciprocal ST ... Aneurysm: • ST