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The Impact of Marijuana Use on Heart Health: What You Need to Know

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In recent years, the use of marijuana, both for medicinal and recreational purposes, has become increasingly prevalent. However, new research is shedding light on the potential negative effects of regular marijuana use on heart health. Two studies presented at the American Heart Association Scientific Sessions have found a concerning association between marijuana use and an increased risk of heart attack, heart failure, and stroke. In this article, we’ll delve into the findings of these studies and explore the potential impact of marijuana use on heart health.

The Studies: Marijuana Use and Cardiovascular Risks

Study 1: Daily Marijuana Use and Heart Failure Risk

One of the studies, conducted by the All of Us Research Program, followed over 150,000 adults without heart failure at the beginning of the study. The participants were surveyed on their marijuana use frequency and were followed for nearly four years. The results revealed a significant association between daily marijuana use and the risk of developing heart failure. Individuals who reported daily marijuana use had a 34% higher risk of heart failure compared to those who had never used marijuana. Importantly, this risk remained consistent across different age groups and sex at birth.

Study 2: Marijuana Use and Acute Cardiovascular Events in Older Adults

The second study focused on older adults with pre-existing cardiovascular risk factors such as high blood pressure, type 2 diabetes, and high cholesterol. Researchers examined the hospital records of over 28,000 marijuana users and compared them to non-users with similar risk factors. The findings showed that marijuana users with cardiovascular risk factors had a significantly higher chance of experiencing a major acute heart or brain event while hospitalized. Approximately 20% of marijuana users experienced such events, compared to 13.9% among non-users. The study also found an increased rate of heart attacks among marijuana users.

Understanding the Mechanisms: How Marijuana Impacts the Heart

While the exact mechanisms through which marijuana affects the heart are still being explored, researchers have identified several potential factors. One key factor is the impact of marijuana on blood pressure. Acute marijuana use has been shown to cause a temporary drop in blood pressure, which may increase the risk of stroke if levels drop too low. On the other hand, long-term marijuana use has been associated with an increase in blood pressure, which can contribute to various cardiovascular conditions, including heart attacks and heart failure.

Another important consideration is the method of marijuana consumption. Smoking or inhaling marijuana can lead to the inhalation of harmful substances such as carbon monoxide and tar, similar to the effects of tobacco cigarettes. These substances have been linked to heart muscle disease, chest pain, heart rhythm disturbances, and other serious cardiovascular conditions.

Implications for Older Adults

The findings of these studies hold particular significance for older adults, as they are more likely to have pre-existing cardiovascular risk factors. Age-related conditions such as high blood pressure, type 2 diabetes, and high cholesterol can exacerbate the negative impact of marijuana use on the heart. Therefore, it is crucial for healthcare professionals to be aware of patients’ marijuana use and consider it as a potential risk factor when assessing cardiovascular health.

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Recommendations for Marijuana Users

Based on the research findings, the American Heart Association recommends refraining from smoking or vaping any substance, including marijuana products. The potential harm to the heart, lungs, and blood vessels associated with smoking or inhaling marijuana underscores the importance of considering alternative methods of consumption. Edibles or other non-smoking forms of marijuana may be a safer option for individuals who wish to use marijuana for medicinal or recreational purposes.

Furthermore, individuals who use marijuana regularly should be proactive in managing other cardiovascular risk factors. This includes maintaining a healthy lifestyle with regular exercise, a balanced diet, and regular check-ups with healthcare professionals to monitor blood pressure, cholesterol levels, and blood sugar levels. By addressing these risk factors, individuals can mitigate some of the potential negative effects of marijuana use on their heart health.


While marijuana use has gained popularity for various reasons, it is crucial to understand the potential risks it poses to heart health. The studies presented at the American Heart Association Scientific Sessions highlight the association between regular marijuana use and an increased risk of heart attack, heart failure, and stroke. Older adults with pre-existing cardiovascular risk factors are particularly vulnerable. By considering alternative methods of consumption and effectively managing other risk factors, individuals can make informed choices to protect their heart health. As always, it is advisable to consult with healthcare professionals for personalized guidance and recommendations regarding marijuana use and its impact on heart health.


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