From the Research
Marijuana use is associated with an increased risk of cardiovascular disease and should be avoided by individuals with pre-existing heart conditions. The most recent and highest quality study, published in 2022 1, found that cannabis use is associated with elevated atherosclerotic cardiovascular disease risk score, with a 60% increased odds of high-risk ASCVD score. This study suggests that individuals using cannabis should be screened for CVD risk, and appropriate risk reduction strategies should be implemented.
Key Findings
- Cannabis use is associated with increased heart rate, elevated blood pressure, and triggered arrhythmias, which can last for up to three hours after use and place additional strain on an already compromised cardiovascular system 2, 3.
- Smoking marijuana exposes users to carbon monoxide and other combustion products that reduce oxygen delivery to the heart, further increasing cardiovascular risk 2, 3.
- Patients with conditions such as coronary artery disease, heart failure, arrhythmias, or hypertension are particularly vulnerable to these effects 2, 4.
- Alternative delivery methods, such as oils or edibles, may reduce some risks compared to smoking, though the cardiovascular effects of THC remain 4.
Recommendations
- Individuals with pre-existing heart conditions should avoid marijuana use due to the increased risk of cardiovascular disease.
- Patients who use marijuana medicinally should discuss alternative delivery methods with their healthcare provider to reduce risks.
- Patients with heart conditions who choose to use marijuana should be aware of symptoms like chest pain, palpitations, or shortness of breath and seek immediate medical attention if these occur.