Washington: New findings into why obese cigarette smokers experience a high risk of heart disease suggest that cigarette smoke affects the activity of hundreds of key genes that both protect the heart and lungs and expose them to damage.The research suggests that the effects may be especially profound in obese nonsmokers who inhale "sidesteam smoke" from cigarettes smoldering nearby.Diana J. Bigelow and colleagues point out that active smoking doubles the risk of heart disease, while second-hand smoke exposure increases this risk by about one-third.
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