Summary Table of Causes

Table 1: ECG changes associated with conditions causing ST segment elevation
Condition	ST Shape	Site	P wave PR depression	Reciprocal Changes	Q waves	T waves
STEMI (Dynamic)	Convex 94%ppv*	Territorial		Common	Will develop	Hyperacute large amplitude
Pericarditis (Dynamic slower)	Concave/ saddle shape	Global	PR depression	AVR not AVL	No	ST:T wave ratio >0.25
BER	Concave notch at J point	Mostly chest leads		AVR in 50%	No	May have large amplitude
Ventricular aneurysm (Static)		Mainly Anterior		May be present	Anterior	Small amplitude
Brugada syndrome	Downward sloping	V1 and V2		No	No	Normal
LBBB		Anterior and inferior discordant to QRS normally		Present	As part of the LBBB pattern	May have large amplitude
Pulmonary embolism		Changes normally antero septal and inferior				Inverted in inferior or anteroseptal leads
Hyperkalaemia	Downward sloping		Low amplitude or absent			Tall tented T waves
SAH		Anterior or diffuse			Maybe present	May have T wave inversion

* ppv- positive predictive value