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Recent cannabis use doubles heart attack risk in younger adults: Study
Adults younger than 45 years who reported recently using cannabis were 2 times more likely to have had a heart attack or myocardial infarction, and this link was stronger infrequent users, according to new research in CMAJ (Canadian Medical Association Journal).
These findings add to evidence from earlier studies showing a link between heavy cannabis use and myocardial infarction in people in hospital settings. The current study carefully examines the relationship that frequency of cannabis use and method of consumption have with the risk of myocardial infarction in younger adults in the community who aren't at high risk of heart attack because of their age.
Researchers looked at data from a survey conducted by the US Centers for Disease Control and Prevention (CDC) including over 33,000 adults aged 18–44 years, of whom 17% reported using cannabis in the past 30 days. Heart attack was reported in 1.3% (61 of 4610) cannabis users and 0.8% (240 of 28,563) nonusers. Cannabis users were more likely to be male, smoke cigarettes, use e-cigarettes (vape), and be heavy alcohol drinkers, which may have contributed to their risk; however, these factors, plus other risk factors for myocardial infarction, were adjusted for in this analysis.
"With recent legalization and decriminalization, cannabis use is increasing in young adults in North America, and we do not fully know its effects on cardiovascular health," says Dr. Karim Ladha, a clinician-scientist at Unity Health Toronto. "We found an association between recent cannabis use and myocardial infarction, which persisted across an array of robust sensitivity analyses. Additionally, this association was consistent across different forms of cannabis consumption, including smoking, vaporization, and other methods such as edibles. This suggests that no method of consumption is safer than another in this regard."
This observational study provides information on the relationship, but not a biological mechanism, for cannabis use and myocardial infarction.
"We analyzed the Behavioral Risk Factor Surveillance System data set (2017–2018) because it is the best available source for providing insights which are generalizable and nationally representative," says Nikhil Mistry, a Ph.D. candidate at the University of Toronto. "As a young adult, it is important to be aware of the risks associated with cannabis use, especially in the current climate where we are exposed to a wealth of misinformation and non–evidence-based health recommendations."
Dr. David Mazer, a clinician-scientist at Unity Health Toronto, adds, "Not only young adults, but physicians and other clinicians need to be aware of this potentially important relationship. Cannabis use should be considered in cardiovascular risk assessment. When making decisions about cannabis consumption, patients and physicians should consider its associated benefits and risks, in the context of their own health risk factors and behaviors."
"The large sample size, generalizability, and detailed data on cannabis consumption of this cross-sectional study provide unique insight into this growing public health concern. Further studies and more data are needed to confirm these findings and elucidate the mechanisms contributing to cannabis-associated cardiovascular outcomes," the authors conclude.
10.1503/cmaj.202392
Medical Dialogues Bureau consists of a team of passionate medical/scientific writers, led by doctors and healthcare researchers. Our team efforts to bring you updated and timely news about the important happenings of the medical and healthcare sector. Our editorial team can be reached at editorial@medicaldialogues.in.
Dr Kamal Kant Kohli-MBBS, DTCD- a chest specialist with more than 30 years of practice and a flair for writing clinical articles, Dr Kamal Kant Kohli joined Medical Dialogues as a Chief Editor of Medical News. Besides writing articles, as an editor, he proofreads and verifies all the medical content published on Medical Dialogues including those coming from journals, studies,medical conferences,guidelines etc. Email: drkohli@medicaldialogues.in. Contact no. 011-43720751