Microparticles - small vesicles circulating in the blood - if injected into the blood stream within 24 hours of the heart attack may reduce the muscle damage to a great extent. After a heart attack much of the damage to the heart muscle is caused by inflammatory cells that rush to the scene of the oxygen-starved tissue. When biodegradable microparticles were injected after a heart attack the size of the heart lesion was reduced by 50 percent and the heart could pump significantly more blood said a path-breaking research. 'The inflammatory damage is reduced to a great extent when microparticles
