Conditions with tall and peak T wave (Incomplete)

.	Normal variant Early repolarization	Acute myocardial infarction (In hyperacute T wave stage)	Hyperkalemia
.	V4 • ST elevation • Concave ST • Distinct J point • Stable pattern	V3 • ST elevation in acute MI has variable characistic and magnitude. • Continue to change, (evolving patterns).	V2 • 1a = Tall and peak T • 1b = Narrow T • 1c = Slur J point • No ST elevation • Concave ST (There are other P, QRS, and ST T abnormalities in hyperkalemia)
ST elevation	Yes	Yes	No
Type of ST	Concave	• Concave in very early hyperacute peak T wave. • Convex in later stage.	Concave
QT interval	Normal	• Normal in hyperacute peak T. • Tend to be prolonged in later stage)	Narrow T wave
J point	Distinct	May be slurred	Slur
Location	More frequent in precordial leads	Depending on location of MI. More prominent in anterior MI.	More global but more evident in precordial leads
Reciprocal change	No	Yes in early stage .In leads opposite MI location.	No
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