A research finding published in the journal Cardiovascular Research on Thursday has warned that vaping devices and the chemicals they deliver may damage the cardiovascular system.
This is a warning to teenagers who are increasingly using the devices or e-cigarettes, despite a growing chorus of concern over injury and deaths related to them.
The study comes after the US Centers for Disease Control and Prevention last month declared an “outbreak of lung injuries” linked to vaping.
“E-cigarettes contain nicotine, particulate matter, metal and flavourings, not just harmless water vapour,” senior author Loren Wold of Ohio State University wrote in Thursday’s study.
“Air pollution studies show that fine particles enter the circulation and have direct effects on the heart — data for e-cigarettes are pointing in that direction.”
Nicotine, also found in tobacco, is known to increase blood pressure and the heart rate.
But other ingredients inhaled through the vaping may lead to inflammation, oxidative stress and unstable blood flow, Wold said.
Ultrafine particulate, for example, has been linked to thrombosis, coronary heart disease and hypertension, among other conditions.
E-cigarettes also contain formaldehyde, which has been classified as a cancer-causing agent and associated with heart damage in experiments with rats.