In the study, investigators examined measures of acute heart function using echocardiography among 36 smokers and 40 vapers, before and after using either a cigarette or e-cigarette. The researchers found that cigarette smoking adversely affected acute heart function. Electronic cigarette use had no effect on any of the measures examined.

This is worth repeating: the nation's federal regulatory agency with jurisdiction over cigarettes is not sure that smoking - which kills more than 400,000 Americans each year - is any more dangerous than vaping, which involves no tobacco and no combustion and has not been shown to cause any harm. The FDA is not convinced that inhaling nicotine plus tens of thousands of chemicals and more than 60 known human carcinogens is any worse than inhaling nicotine plus propylene glycol and low levels of a few other chemicals.

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