Bivalirudin or unfractionated heparin in patients with acute coronary syndromes managed invasively with and without ST elevation (MATRIX): randomised controlled trial.

Objective:  To test the optimal antithrombotic regimen in patients with acute coronary syndrome.

Design:  Randomised controlled trial.

Setting:  Patients with acute coronary syndrome with and without ST segment elevation in 78 centres in Italy, the Netherlands, Spain, and Sweden.