According to a report presented at the Scientific Session of the American Heart Association in 2014, marijuana smoke, like cigarette smoke, can damage the heart and blood vessels.
In the study, researchers used ultrasound machines, high-resolution, to assess the functioning of peripheral arterial disease after exposure to marijuana smoke.
A 30-minute exposure to secondhand smoke marijuana lead to dysfunction of the blood vessels in 70% of laboratory rats, even despite the fact that marijuana is used in the study contained no connection - tetrahydrocannabinol (THC), which is considered to be toxic to the blood vessels. Reduced function of blood vessels increases the risk of atherosclerosis and heart attacks.
The researchers also found that blood vessels after exposure to tobacco smoke at once recovered their functions, but after exposure to marijuana smoke the blood vessels over time have not been able to recover their functions.
"Everyone knows that second-hand smoke nicotine is very harmful to health, but not everyone knows that passive smoking marijuana also negatively affects the cardiovascular system. Therefore, people should avoid exposure to both tobacco smoke and marijuana smoke, to prevent the development of heart disease, "- says the study's senior author, Dr. Matthew Springer of the University of California at San Francisco.
Reduced function of blood vessels as a result of the use of cannabis without THC compounds casts doubt on the theory that only a part of the compound THC marijuana are harmful to blood vessels.
More scientific article:
Springer M, Wang X, Narayan S, et al. At The American Heart Association's Scientific Sessions 2014. 2014.
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