One e-cigarette with nicotine leads to adrenaline changes in nonsmokers' hearts
The findings are published in Journal of the American Heart Association , the Open Access Journal of the American Heart Association/American Stroke Association. Unlike cigarettes, e-cigs have no combustion or tobacco. Instead, these electronic , handheld devices deliver nicotine with flavoring and other chemicals in a vapor instead of smoke. "While e-cigarettes typically deliver fewer carcinogens than are found in the tar of tobacco cigarette smoke, they also usually deliver nicotine. Many believe that the tar -- not the nicotine -- is what leads to increased cancer and heart attack risks," said Dr. Holly R. Middlekauff, senior study author and professor of medicine (cardiology) and physiology at the David Geffen School of Medicine at UCLA. "So, we asked the question, are e-cigarettes safe?" The researchers had previously reported that chronic e-cig users have elevated sympathetic nerve activity which increases adrenaline directed to the heart and are more...