<unk>  denotes the adaptive enlargement of coronary artery in response to plaque formation. Lumen area is preserved during the early stage of coronary artery disease and lumen encroachment becomes evident until the lesion occupies greater than 40% of the internal elastic lamina area. Thus, angiography-detectable stenosis and significant functional impairment may be delayed despite the presence of a fairly sizable atherosclerotic plaque.
Glagov phenomenon
Ashman phenomenon
Rosenbach sign
Hill sign
Palla's sign
Lazarus phenomenon
Kernig's sign
Quincke sign