[Serum level of homocysteine and the development of collateral circulation in patients with severe coronary artery stenosis].

Objective: To investigate the relationship between serum level of homocysteine and the development of collaterals in patients with severe coronary artery stenosis (SCAS).

Methods: Eighty patients with at least one vessel stenosis over 90% among the 3 main vessels of coronary artery were consecutively enrolled into the study according to angiographic estimation. The development of collaterals was classified by Rentrop's method.