It is established that atherosclerotic patients with impaired major ar
teries of the head have high concentration of blood lipoprotein (a) fo
llowing ischemic disorder of cerebral circulation. Irrespectively of t
he clinical picture, atherosclerosis of the major head arteries correl
ated in severity with blood levels of lipoprotein (a). It is suggested
that lipoprotein (a) can serve an essential biochemical marker of maj
or head arteries atherosclerosis.