What is the definition of non-q-wave infarction?

See answer.: A non Q wave myocardial infarction is an electrocariographic phenomenon. It usually implies a heart attack with less extensive damage than a Q wave one which implies damage from the inner wall to the outer wall of the heart. The findings on the electrocardiogram can be variable and must be correlated with the patient's symptoms and blood tests which confirm damage to the heart muscle.

EKG diagnosis: When a piece of heart muscle dies, it no longer has electrical activity. This shows up on an ekg as a q wave. If someone clinically has a heart attack but the ekg never evolves q waves, it is (by definition) a "non-q wave" mi.