1. Injury, Ischemia, and Infarction patterns
Basic EKG interpretation

2. -ST Elevations
-ST Depressions
-T wave inversions
-Non specific ST-T changes
-Q waves

4. ST Elevations

5. Definition
●New ST-segment elevation at the J-point in two contiguous leads with the cut-points: ≥0.1 mV (1 mm) in all leads other than leads V2-V3;

6. Definition
●New ST-segment elevation at the J-point in two contiguous leads with the cut-points: ≥0.1 mV (1 mm) in all leads other than leads V2-V3;
●For leads V2-V3: ≥2 mm in men ≥40 years; ≥2.5 mm in men <40 years, or ≥1.5 mm in women regardless of age.

8. STEMI imitators -Pericarditis -Prinzmetel’s Angina
-Early repolarization
-Left Ventricular Hypertrophy
-LBBB
-Ventricular aneurysm
-Ventricular paced
-Increased intracranial pressure
-Brugada syndrome

9. ST depression criteria
-New horizontal or downsloping ST depression >= 0.5 mm in two contiguous leads
-Deeper ST depressions indicate higher likelihood of ACS and worse prognosis

12. T wave inversions
-Inversions deeper than 1 mm in two contiguous leads

14. Nonspecific ST-T changes
-ST-T changes that don’t meet above criteria

16. Differential diagnosis for Nonspecific ST-T changes
-Physiologic variant
-Electrolyte abnormalities
-Fever
-Acidosis/Alkalosis
-Endogenous catecholamines
-Drugs
-Acute abdominal process
-Metabolic changes
-CVA
-Myocarditis
-Pericarditis
-Pulmonary emboli
-Myocardial ischemia
-Pulmonary processes

17. Pathologic Q waves 40 ms (1mm) in duration At least 1 mm deep
Greater than 25% of entire QRS amplitude
Two contiguous leads