Often, a heart attack is caused by blockage of the coronary artery due to fat. It is crucial to maintain a healthy diet to avoid encountering life-threatening problems. Eating junk food or fast food daily is dangerous for the human body. Exercise is also important for the body to maintain a healthy lifestyle. Another prevention method is taking medications. Drugs can reduce the risk of heart attack. A common way to prevent almost all diseases is to avoid smoking and manage stress. Restoring blood flow to the heart can treat heart attacks, and taking medications can do this. For example, aspirin can reduce blood clotting so that blood can be easily transported to the heart. Other drugs for treatment include thrombolytics, which dissolve blood clots, antiplatelet agents, which prevent clots from getting bigger and forming new ones, and blood-thinning drugs. An additional treatment available is surgery; Coronary angioplasty and stenting involves inserting a stent into a blocked coronary artery to open it. Coronary artery bypass surgery involves removing a blocked artery and replacing it with a graft so that blood can continue to flow. Heart attacks can be treated before too much damage occurs that makes it impossible to return to normal