Preliminary research set to be presented at the American Heart Association’s Scientific Sessions 2026 links cannabis use with a higher risk of cardiovascular disease and stroke. Analyzing survey data from nearly half a million U.S. adults between 2020 and 2024, Prevention reported that even occasional consumption across various modalities poses distinct vascular risks.
Cannabis Compounds Alter Heart Rate and Vessel Function
- Mechanism of Action: THC attaches straight to cannabinoid receptors located within blood vessels and the heart, potentially accelerating your pulse and triggering abrupt blood pressure shifts.
- Endothelial Function: Cannabis use can decrease nitric oxide, a molecule that plays a protective role for blood vessels by reducing inflammation and arterial plaque that can build up over time.
- Thrombosis Risk: Cannabis can make platelets more likely to clump, raising the chances of developing a blockage.
Cardiovascular Risks Across Consumption Frequencies
As recreational legalization expands across the United States, adult consumption has climbed significantly. Up to 1 in 4 adults have consumed cannabis over the past year, driving U.S. usage to unprecedented levels; meanwhile, 2024 data shows that one out of every six adults engaged in cannabis consumption during the prior month, marking an increase from one in 10 individuals in 2020.
The preliminary findings draw from the U.S. Behavioral Risk Factor Surveillance System, capturing telephone survey responses from jurisdictions tracking cannabis information between 2020 and 2024. Participants reported their monthly use—whether through smoking, vaping, or ingesting edibles—alongside any formal medical diagnoses of cardiovascular disease, heart attacks, or strokes.
Compared to non-users, individuals consuming cannabis one to five days monthly demonstrated 23% higher odds of reporting a cardiovascular disease diagnosis. Those utilizing cannabis 16 to 30 days monthly showed a 21% elevation in similar reports, according to findings covered by Prevention and USA Today.
| Monthly Cannabis Use | Cardiovascular Disease Odds | Reported Stroke Odds |
|---|---|---|
| Low Frequency (1–5 days) | 23% Higher | 40% Higher |
| Moderate Frequency (6–15 days) | — | — |
| Heavy Frequency (16–30 days) | 21% Higher | 25% Higher |
Mechanisms Connecting THC to Vascular Distress
A common misconception among consumers is that switching from smoking to edibles eliminates health risks. However, cardiologists emphasize that tetrahydrocannabinol (THC), the primary psychoactive cannabinoid, exerts direct pharmacological effects on the cardiovascular system regardless of the delivery mechanism.
Dr. Sirisha Vadali, program director of HonorHealth’s cardiometabolic program, explains that THC binds to vascular receptors, triggering sudden blood pressure fluctuations and elevating heart rate. The substance can decrease nitric oxide, an essential endothelial factor that normally protects arteries by reducing inflammation.
In addition, cannabis can make platelets more likely to clump, which can raise the chances of developing a blockage. Dr. Travis Benzing of Harbor Health is among the cardiologists weighing in on what the findings mean for people who partake.
Pre-Existing Conditions Require Caution Regarding Cannabis Use
Patients with pre-existing conditions—including high blood pressure, diabetes, a family history of heart disease, or a past heart problem—should exercise caution. These conclusions remain preliminary and lack peer review because the survey relied strictly on self-reported data concerning heart disease diagnoses and marijuana use, evaluated connections at just one specific moment in time, and because authors note they lack information about the potency of the cannabis participants used.
Individuals who utilize cannabis should openly discuss their consumption habits with their healthcare providers, particularly if they rely on it to manage chronic pain or sleep disturbances. Providers can discuss alternatives, including behavioral approaches and medications when appropriate, that may help address pain or sleep difficulties without exposing patients to the same potential cannabis-related risks.
Public Health Surveillance Data Forms Analysis Base
The underlying analysis drew on public health surveillance data through the Behavioral Risk Factor Surveillance System. The findings are preliminary research to be presented at the American Heart Association’s Scientific Sessions 2026 and have not yet been peer-reviewed.
References
- American Heart Association. Scientific Sessions 2026: Cannabis use linked to an increased risk of cardiovascular disease, especially strokes. AHA Newsroom.
