Conditions with ST elevation

Click for 12 leads ECG	Acute Myocardial Infarction	Pericarditis	Early Repolarization (Normal variant)	LVH	LBBB IVCD, Ventricular pacing, PVC, ventricular rhythm
These cases are more typical.
	Anterior V3 Inferior III	V3  II 1= ST elevation 2= PR shift	V4	V1	V1
Location	Localize. ST elevation in MI location leads.	Generalize. Usually seen in both anterolateral and inferior leads.	Most in precordial leads. (More difficult to differentiate from early stage of pericarditis if limb leads is involved)	V1-V3. There will be ST depression and T wave inversion in LV leads (V5-6, I, aVL)	V1-V3 There will be ST depression and T wave inversion in LV leads (V5-6, I, aVL)
ST characteristic	Variable depends on stage. Concave, straight or convex.	Concave ST, early (stage I) Convex ST, later (stage 2)	Concave ST	More frequent concave ST	More frequent straight ST
Reciprocal change	Occur only in early stage in leads opposite MI location.	In aVR and infrequently in V1	May be in aVR	ST depression and asymmetrical T wave inversion (2ry ST T abnormalities) in upright QRS leads.	ST depression and asymmetrical T wave inversion (2ry ST T abnormaoities) in upright QRS leads.
J point	Slur, after hyper acute T stage.	Distinct	Distinct	Disticct	Distinct
QT interval	Normal or prolong	Not prolong	Not prolong	Not prolong	Not prolong.
PR shift	Only few case	Yes	No	No	No
See more detail from each specific diagnosis

Less common conditions (Modified from Chou's Electrocardiography in Clinical Practice)
 - Hyperkalemia
 - Marked QRS widening
 - Drugs effect e.g., antidepressant, class 1C antiarrhymic drugs
 - Acute ascending aortic dissection, may involve coronary osteum
 - Myocarditis
 - Pancreatitis, gallbladder disease
 - Miscellaneous. Cardiac tumor, septic shock, anaphylactic reaction, Osborn wave in hypothermia
 - Brugada syndrome, spinal chord injury (C5-C6)

Go to various conditions, click the condition titles above