The group's principal activities are to develop, manufacture and market advanced medical devices, systems and integrated cardiovascular management systems. the group also produces and markets medical systems that provides diagnostic interpretation of certain disease. this includes a line of ambulatory ischemic heart monitors, interpretative electrocardiographs, a system for the analysis of heart rate variability and a system for the measurement of venous blood flow. disease management services accounted for 94% of 2001 revenues and medical equipment, 6%.