Contour: Most→Least concerning for ischemia: Planar/Flat (90%) → Concave up (33%) → Downsloping with Asymmetric inverted T-wave (not ischemic/strain pattern)
Assume posterior STEMI or reciprocal changes to STEMI until proven otherwise
Indicators of ischemia:
>0.5mm<unk>  from baseline (especially >1mm) in two or more contiguous leads
Transient<unk> 
Morphology that is flat or downsloping
Strain: 
tall R wave
only in lateral leads (not anterior)
"checkbox" or asymmetric TWI
down sloping pattern
>0.5mm<unk>  from baseline (especially >1mm) in two or more contiguous leads
Transient<unk> 
Morphology that is flat or downsloping
tall R wave
only in lateral leads (not anterior)
"checkbox" or asymmetric TWI
down sloping pattern
ST segment depression
Posterior MI 
T wave changes
RV strain
ST segment elevation
NSTEMI
AVR ST elevation
Reciprocal changes