University of Gothenburg -- Half of all patients who undergo myocardial infarction are experiencing onerous fatigue four months after the infarction. The patients who are most fatigued are those who perceive the infarction as a sign of chronic illness, those who experience the illness as difficult to control, and those who believe that the illness has a large impact on their life. These are the conclusions of a thesis presented at the Sahlgrenska Academy.