DEFINITION:
The death of a portion of heart muscle as a result of inadequate blood supply to the relevant area. The diagnosis must be based on:

a) New electrocardiographic changes indicative of a myocardial infarction, and by

b) The elevation of cardiac biochemical markers, or the elevation of cardiac enzymes, to levels considered diagnostic for infarction. A heart attack during coronary angioplasty is covered provided that there are diagnostic changes of new Q wave infarction on the electrocardiogram, in addition to elevation of cardiac markers. Heart attack does not include an incidental finding of electrocardiographic changes suggesting a prior myocardial infarction, in the absence of a corroborating event.

INTERPRETATION:
A Heart Attack, no matter how minor, causes damage to the heart muscle. The definition's required conditions for diagnosis will both be present if you suffer a Myocardial Infarction (Heart Attack). Even an infarct, where no chest pain is present, will be covered, providing it is investigated at the time of occurrence and the required conditions are present.