If asthma, lung cancer, and emphysema aren’t enough to scare you off, it turns out smokers are two to four times more likely to develop coronary artery disease (CAD) than nonsmokers. Cardiovascular disease—including CAD, heart failure, and heart attack—is the leading killer in the U.S., claiming more than 860,000 lives in 2005. Smoking ups your risk for heart disease by decreasing the flow of oxygen to the heart and raises your risk fo ... Jump to full article >>