A controversial study that reported that vapers had the same risk of heart disease as smokers was recently withdrawn by the journal as it did not take into consideration that almost all the vapers involved were current or former smokers.

A better understanding of the effect of e-cigarettes on the heart is beginning to emerge. A randomised control trial that measured the vascular effects of smokers switching to vaping was published in December with encouraging results. Those who switched to e-cigarettes completely experienced the largest improvement in their vascular health, getting close to the healthy “control”. Larger studies with longer follow up will provide greater confidence. The debate continues here and here.