A recent article by RS Moheimani and colleagues at UCLA in JAMA Cardiology examined heart rhythms and oxidative loads in chronic e-cigarette only users. They found reduced heart rate variability, the variation in the time between heart beats. Reductions in heart rate variability are a well-established predictor of future heart attacks. This adds additional evidence that e-cigarette use increases cardiovascular risks.
The February Nicotine and Tobacco Research issue editorializes that modelling of population effects of e-cigarette use can be a helpful guide to future e-cigarette policy decisions; https://academic.oup.com/ntr/issue/19/2
With 2 reviews, 13 original investigations, 2 brief reports and 3 letters, this issue has a wealth of information on the place of e-cigarettes in different regulatory environments
Longitudinal surveys from middle and high school students from fall 2013 (wave 1) and spring 2014 (wave 2) were used to examine reasons for trying e-cigarettes as predictors of continued e-cigarette use over time. Several reasons for first trying e-cigarettes predicted continued use, including low cost, the ability to use e-cigarettes anywhere, and to quit smoking regular cigarettes.