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E-cigarettes damage brain, heart, lungs and blood vessels, study finds


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E-cigarettes damage brain, heart, lungs and blood vessels, study finds

E-cigarettes damage the brain, heart, blood vessels and lungs, according to a new study by cardiologists who have called for a ban on vaping. The study, published in the European Heart Journal, casts fresh light on the mechanisms by which e-cigarettes can cause damage to the body through toxic chemicals produced in the vaping process,…

E-cigarettes damage brain, heart, lungs and blood vessels, study finds

E-cigarettes damage the brain, heart, blood vessels and lungs, according to a new study by cardiologists who have called for a ban on vaping.

The study, published in the European Heart Journal, casts fresh light on the mechanisms by which e-cigarettes can cause damage to the body through toxic chemicals produced in the vaping process, and which may also be present at lower concentrations in the vaping liquid.

Based on tests performed on healthy smokers and mice, the study is the latest piece of research to point to the harmful effects of vaping.

They found just one vaping episode increased heart rates and caused the arteries to stiffen

Earlier this week, separate research found the fluid in e-cigarettes may cause potentially life-threatening inflammation in those who are susceptible.

In the latest research, German scientists investigated the effect of e-cigarette vapour on blood flow in the main blood artery in the upper arm of 20 healthy smokers before they vaped an e-cigarette and then 15 minutes afterwards. They also measured how stiff the artery became. In addition, they exposed 151 mice to e-cigarette vapour over one, three or five days for 20 minutes six times a day.

They found just one vaping episode increased heart rates and caused the arteries to stiffen and the inner lining of the arteries, the endothelium, to stop working properly in the smokers. The endothelium protects tissues from toxic substances and regulates inflammation and blood-clotting processes. Endothelial dysfunction is involved in the development of cardiovascular disease.


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Results from the mice showed an enzyme called NOX-2 was responsible for damage to blood vessels in the lungs and the brain as a result of e-cigarette vapour.

“We also found a toxic chemical called acrolein, which is produced when the liquid in e-cigarettes is vaporised, activated the damaging effects of NOX-2,” said Prof Thomas Münzel, of the University Medical Centre Mainz, who led the study.

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Prof Münzel said e-cigarettes were so dangerous, and addictive, that countries should consider banning them. “We cannot allow an entire generation to become addicted to nicotine,” he said.

‘Worrying’ findings

A limitation of the study was that no healthy non-smokers were included. The researchers say a strength is that they received no funding from the e-cigarette industry. “Recent studies indicate that e-cigarette industry funding is more likely to lead to results that indicate that e-cigarettes are harmless,” they write.

Dr Paddy Barrett, a cardiologist at the Blackrock Clinic in Dublin, said vaping was likely to be “the lesser of two evils” compared to smoking but warned of “disproportionately large” impacts where people start vaping at a young age.

“It has taken decades of work to substantially reduce smoking rates in Ireland and for us to begin to realise the public health benefits. Much of this work will be eroded if we simply substitute one potentially less toxic exposure to a much broader population at a younger and younger age.”

While long-term data on the effects of vaping were needed, to wait for this “would be to wait too long”, he warned.

Four EU member states – Portugal, Italy, Romania and Slovenia – have introduced taxes on e-cigarettes, or on the liquid used in them
The Government plans to introduce legislation soon to ban the sale of vaping products to under-18s, and to introduce a licensing system for such products.

The Royal College of Physicians of Ireland (RCPI) described the findings as “worrying”. “It certainly strengthens the concerns of doctors around the potentially serious health impacts of e-cigarettes, and also demonstrates the importance of performing independent research in this area without the funding of e-cigarette companies,” said Dr Des Cox, chair of the RCPI’s tobacco policy group.

vape Business Ireland noted the small sample size used in the research, and pointed to a recent statement from Public Health England, which says e-cigarettes are “far less harmful than smoking”.

The Government plans to introduce legislation soon to ban the sale of vaping products to under-18s, and to introduce a licensing system for such products.

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