THE EFFICIENCY OF ANTI-COAGULANTS APPLIED DURING TRANSCUTANEOUS CORONARY INTERVENTIONS IN PATIENTS WITH ACUTE CORONARY SYNDROME WITHOUT ELEVATION OF ST SEGMENT

Abstract

The purpose of study. To evaluate efficiency of different coagulants used under transcutaneous coronary interventions in patients with acute coronary syndrome without elevation of ST segment.The methods. The sampling of 346 patients was randomized in two groups. In the group I (n=155) transcutaneous coronary intervention was implemented using bivalirudin and in group II (n = 191) - using unfractionated heparin. The additional randomization of patients of group I: in subgroup A (n = 77) infusion of bivalirudin continued during four hours after intervention and in subgroup B (n = 78) infusion was discontinued in X-ray operating room. The criteria of inclusion: patients with acute coronary syndrome without elevation of ST segment with multi-vascular affection of coronary channel (risk on SYNTAX score = 23-32); high and medium degree of risk according GRACE scale; absence of re-vascularization of myocardium in anamnesis. The criteria of exclusion: patients with very high risk according GRACE scale; affection of left coronary artery trunk. The results. During period of hospitalization, total rate of intra- and post-operative cardiovascular complications had no reliable differences in two groups and amounted to 7.1% and 8.4% correspondingly (p = 0.6423). The serious bleedings (BARC 3 and 5) occurred reliably more frequently in patients of group II. Also, the groups had no differences in rate of development of acute thrombosis of stents. In subgroup A reliably less frequently occurred serious cardiovascular complications as compared with patients of subgroup B (1,3% и 13% correspondingly; р = 0,001). At that, rate of bleeding reliably had no differences. At trans-radial access, in patients of group I rate of bleeding and cardiovascular complications amounted to 0% and 2.9% and at trans-femoral access these indices were reliably higher - 3,3% и 10% correspondingly (р < 0,001). In group II a similar tendency is noted: at trans-radial access these indices amounted to 6% and 4.6% and at trans-femoral - 33.7% and 11.9% correspondingly (р