How Cannabis Affects the Heart
Cannabis use can increase heart rate by 20 to 50 percent within minutes of consumption, according to the American Heart Association. This elevated heart rate can raise the heart's oxygen demand while simultaneously reducing the oxygen supply, creating a mismatch that may trigger cardiac events in vulnerable individuals. The effect is most pronounced with high-THC products and in people with pre-existing heart conditions.
The active compounds in cannabis, particularly THC, interact with the endocannabinoid system and can cause temporary spikes in blood pressure and heart rate. For individuals with coronary artery disease, this stress can potentially precipitate angina or a heart attack. The risk is highest during the first hour after use, which is why emergency room visits for chest pain and heart palpitations often spike shortly after cannabis consumption.
What the Latest Research Says
A 2024 study published in the Journal of the American Heart Association found that cannabis users had a significantly higher risk of heart attack compared to non-users, especially in the 18 to 44 age group. The data showed that even occasional use was associated with increased emergency department visits for acute coronary syndrome. The researchers adjusted for tobacco use and other confounders, confirming an independent cardiovascular risk.
The American College of Cardiology has also highlighted cannabis as a potential trigger for atrial fibrillation and other arrhythmias. With the rapid legalization and commercialization of cannabis products, emergency physicians are reporting more cases of cannabis-associated cardiac events. Companies in the cannabis industry, including publicly traded firms like Canopy Growth and Tilray Brands, are increasingly facing scrutiny over the health claims made about their products.
Who Is Most at Risk
Individuals with existing cardiovascular disease, hypertension, or a history of heart attack face the highest risk when using cannabis. Older adults and those with multiple heart disease risk factors, such as diabetes or high cholesterol, are particularly vulnerable. The combination of cannabis with other stimulants or medications can further amplify the cardiovascular strain.
Public health agencies, including the FDA and the CDC, have issued warnings about the cardiovascular dangers of cannabis, particularly in edible and concentrated forms. As the legal cannabis market expands, regulatory bodies are working to establish clearer labeling and dosing guidelines. Investors and consumers are increasingly looking at the long-term health implications of cannabis use, which could influence market trends and company valuations in the sector.