Do you mean distal Anterior wall?
This means a section at the bottom/front of the heart muscle is restricted in receiving a normal flow of blood through the coronary arteries. Ischemia is simply translated Isch (restriction) haema (blood). So in basic terms you have a narrowing in a coronary artery at the lower front of the heart. I assume your heart is fine in relaxed conditions, but shows this problem when you exert yourself, such as in the 'stress' test. Medication should be sufficient to assist with any symptoms but your cardiologist will obviously go through options with you.