An inexpensive four-drug combination reduces by 90 percent the death risk for heart attack victims and unstable angina patients.That’s what University of Michigan researchers report in the Feb. 16 online issue of Circulation.The study of 1,264 adults found patients who took the combination of aspirin, a beta blocker, an ACE inhibitor and a statin had a 90 percent lower risk of dying in the six months after they were discharged from hospital than patients who took none of the four drugs.Patients who took only two or three of the drugs also had a much lower risk of death than patients who received none of the drugs, the study says.The four classes of medications in this study are: anti-platelets, which include aspirin and other drugs that prevent blood clots from forming; statins, cholesterol-lowering drugs; ACE inhibitors, blood pressure-lowering drugs; beta blockers, adrenaline-blocking drugs that ease the burden on the heart.This is the first study to demonstrate the effect of these drugs used in combination.