Vascular surgeons know vascular disease and its treatment, yet uncerta
inties about the future of their specialty require an examination of i
ts two basic components: knowledge and know-how. Knowledge, or underst
anding, flows from research efforts, and expands the scientific basis
of our medical knowledge. It is imperative that new knowledge through
funded research continues so that vascular surgical science progresses
. Know-how, or skill, is a crucial component of the vascular surgeon's
armamentarium and has been recognized through our history as a criter
ion of a surgeon's proficiency. The vascular fellowship program provid
es the vascular surgical trainee with the knowledge and know-how neces
sary to become accomplished and qualified for certification in this sp
ecialty. Future progress in vascular surgery depends on new knowledge
and know-how and their innovative application to human vascular diseas
e. This may involve a formal cooperative relationship between the two
national vascular societies and our colleagues in interventional radio
logy to develop a comprehensive vascular health care program. The soci
eties together must continually evaluate the forces for change that ar
e prevalent in the health care environment to expand this program. Thi
s will ensure a healthy forecast for our dynamic specialty in the twen
ty-fist century.