E-cigarettes may damage the heart, study says

E-cigarettes may cause inflammation, oxidative stress and unstable blood flow, the study found.

Vaping devices and the chemicals they deliver -- increasingly popular among teens -- may damage the cardiovascular system, a study said Thursday, adding to a growing chorus of concern over injury and deaths related to e-cigarettes.

The latest findings, published in the journal Cardiovascular Research, come after the US Centers for Disease Control and Prevention last month declared an "outbreak of lung injuries" linked to vaping.