Creatine, D-Ribose, B1 Vitamin, and B6 Vitamin in Ischemic Heart Disease

The investigators will enroll patients with previous acute coronary syndrome treated for at least 30 days by hospital discharge. The treatment regimen of all patients will be optimized in accordance with European Society of Cardiology guidelines. Standardized pharmacological treatment during cardiac rehabilitation period will include administration of angiotensin converting enzyme inhibition (ACE), beta-blockers and antiplatelet blockers. Furthermore, in order to keep patients free from angina symptoms, in some cases calcium channel blockers and/or nitrates will be used. The investigators will randomize participants into two groups, one receiving treatment Creatine, D-Ribose, B1 Vitamin, and B6 vitamin, and one receiving placebo in a double blind study design, for 6 months.