Tall T waves?

I found a really nice chart to help elucidate the diffeent types of tall, peaked T waves. A lot of people look at tall T waves and aren't sure if the patient has hyperkalemia or is having an acute myocardial infarction (heart attack). The first finding when someone is having a heart attack is "hyperacute" T waves. Then you see the ST elevations. These hyperacute T waves, are wider, rounder at the top, and symmetrical as opposed to the hyperkalemia T waves which are narrow and sharp. Of course, some tall T waves are normal, but they are usually uneven and asymmetrical.

Take a look at this nice chart!