Increases HR: Marijuana use increases heart rate by 20%-100%, shortly after smoking. Marijuana users have 4.8 times greater chance of heart attack in the first hour after smoking. It causes palpitations & arhythmias as well as elevation of actual heart rate. http://www.ncbi.nlm.nih.gov/pubmed/11401936.
Answered 9/12/2017
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Increases: Smoking anything increases heart rate. Holding one's breath increases heart rate. Why do you need to know this?
Answered 1/23/2019
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