Electrocardiogram
we are learning what a normal EKG looks like and what to suspect in the case of an abnormal one. The ST segment for instance should be isometric (neither elevated or depressed) if it is raised it indicates an infarction (the heart is not getting enough blood and cells are dying)
a tall pointy T wave indicates hyperkalemia (to much potasium). Learning these things makes me feel like I really am on the road to becoming a nurse.