Cannabis users 29% more likely to experience heart risks, new study shows

A new study builds on previous research that shows marijuana usage can contribute to cardiovascular risks.
Research published in Heart, an international peer-reviewed journal, documents that adults who use cannabis are 29% more likely than nonusers to develop Acute Coronary Syndrome and 20% more likely than nonusers to suffer from stroke. Acute Coronary Syndrome is any condition brought on by a reduction or blockage of blood flow to the heart, which can result in heart attacks.
Researchers surveyed 24 studies conducted between 2016 and 2023 that involved more than 400 million participants, ranging mostly between 19 and 59, according to the study.
"Our findings are consistent with those from previous reviews, which outlined a positive association between cannabis use and cardiovascular disorders," the study states. "The increased awareness of this potential risk among cannabis users should encourage investigating such use in all patients presenting with serious cardiovascular disorders."
Marijuana news: New study finds cannabis edibles raise risk of premature heart disease
Simply put, not enough research has been conducted to determine just how marijuana affects the cardiovascular system. The research that has been done has largely been conducted on the effects of smoking cannabis, in contrast to other modes of consumption like edibles.
But generally, researchers understand that marijuana can make the heart beat faster and raise blood pressure, as reported by the Centers for Disease Control and Prevention (CDC).
Ahmed Mahmoud, a clinical instructor at Boston University, previously told USA TODAY that researchers believe marijuana may make small defects in the coronary arteries' lining, the thin layer of cells that forms the inner surface of blood vessels and hollow organs.
"Because cannabis increases the blood pressure and makes the blood run very fast and make some detects in the lining to the coronary arteries, this somehow could make a thrombosis (formation of a blood clot) or a temporary thrombosis in these arteries, which makes a cardiac ischemic (stroke) or the heart muscle is not getting enough oxygen to function," Mahmoud previously told USA TODAY. "This is what makes the heart injured and this is a myocardial infarction or heart attack."
Terms to know: Is marijuana the same as cannabis? What is THC?
The new study aligns with previous research about cannabis' effects on the cardiovascular system.
A study published earlier this year found that people under the age of 50 who consume marijuana are about 6.2 times more likely to experience a heart attack than nonusers. Young marijuana users are also 4.3 times more likely to experience an ischemic stroke and 2 times more likely to experience heart failure, the study shows.
And a study published in the Journal of the American Heart Association last year found the same, that cannabis users are more likely to experience cardiovascular risks than those who do not partake.

Try Our AI Features

Explore what Daily8 AI can do for you:

Learn with AIFact CheckingText to SpeechAI Summary

Related Articles

Chicago Tribune

5 hours ago

• Chicago Tribune

US measles count now tops 1,200 cases, and Iowa announces an outbreak

The U.S. logged fewer than 20 measles cases this week, though Iowa announced the state's first outbreak Thursday and Georgia confirmed its second Wednesday. There have been 1,214 confirmed measles cases this year, the Centers for Disease Control and Prevention said Friday. Health officials in Texas, where the nation's biggest outbreak raged during the late winter and spring, confirmed six cases in the last week. There are three other major outbreaks in North America. The longest, in Ontario, Canada, has resulted in 2,179 cases from mid-October through June 17. The province logged its first death June 5 in a baby who got congenital measles but also had other preexisting conditions. Another outbreak in Alberta, Canada, has sickened 996 as of Thursday. And the Mexican state of Chihuahua had 2,335 measles cases and four deaths as of Friday, according to data from the state health ministry. Other U.S. states with active outbreaks — which the CDC defines as three or more related cases — include Arizona, Colorado, Illinois, Kansas, Montana, New Mexico, North Dakota and Oklahoma. In the U.S., two elementary school-aged children in the epicenter in West Texas and an adult in New Mexico have died of measles this year. All were unvaccinated. Measles vaccination rates drop after COVID-19 pandemic in counties across the USMeasles is caused by a highly contagious virus that's airborne and spreads easily when an infected person breathes, sneezes or coughs. It is preventable through vaccines and has been considered eliminated from the U.S. since 2000. There are a total of 750 cases across 35 counties, most of them in West Texas, state health officials said Tuesday. Throughout the outbreak, 97 people have been hospitalized. State health officials estimated less than 1% of cases — fewer than 10 — are actively infectious. Fifty-five percent of Texas' cases are in Gaines County, where the virus started spreading in a close-knit, undervaccinated Mennonite community. The county has had 413 cases since late January — just under 2% of its residents. The April 3 death in Texas was an 8-year-old child, according to Health Secretary Robert F. Kennedy Jr. Local health officials said the child did not have underlying health conditions and died of 'what the child's doctor described as measles pulmonary failure.' A unvaccinated child with no underlying conditions died of measles in Texas in late February; Kennedy said the child was 6. New Mexico held steady Friday with a total of 81 cases. Seven people have been hospitalized since the outbreak started. Most of the state's cases are in Lea County. Sandoval County near Albuquerque has six cases, Eddy County has three, Doña Ana County has two. Chaves, Curry and San Juan counties have one each. An unvaccinated adult died of measles-related illness March 6. The person did not seek medical care. Oklahoma added one case Friday for a total of 17 confirmed and three probable cases. The state health department is not releasing which counties have cases. Arizona has four cases in Navajo County. They are linked to a single source, the county health department said June 9. All four were unvaccinated and had a history of recent international travel. Colorado has seen a total of 16 measles cases in 2025, which includes one outbreak of 10 related cases. The outbreak is linked to a Turkish Airlines flight that landed at Denver International Airport in mid-May. Four of the people were on the flight with the first case — an out-of-state traveler not included in the state count — while five got measles from exposure in the airport and one elsewhere. Health officials are also tracking an unrelated case in a Boulder County resident. The person was fully vaccinated but had 'recently traveled to Europe, where there are a large number of measles cases,' the state health department said. Other counties that have seen measles this year include Archuleta and Pueblo. Georgia has an outbreak of three cases in metro Atlanta, with the most recent infection confirmed Wednesday. The state has confirmed six total cases in 2025. The remaining three are part of an unrelated outbreak from January. Illinois health officials confirmed a four-case outbreak on May 5 in the far southern part of the state. It grew to eight cases as of June 6, but no new cases were reported in the following weeks, according to the Illinois Department of Public Health. The state's other two cases so far this year were in Cook County, and are unrelated to the southern Illinois outbreak. Illinois unveils online tool showing measles vaccination rates by schoolIowa has had six total measles cases in 2025. Four are part of an outbreak in eastern Johnson County, among members of the same household. County health officials said the people are isolating at home, so they don't expect additional spread. Kansas has a total of 79 cases across 11 counties in the southwestern part of the state, with three hospitalizations. All but three of the cases are connected, and most are in Gray County. Montana had 22 measles cases as of Friday. Fourteen were in Gallatin County, which is where the first cases showed up — Montana's first in 35 years. Flathead and Yellowstone counties had two cases each, and Hill County had four cases. There are outbreaks in neighboring North Dakota and the Canadian provinces of Alberta, British Columbia and Saskatchewan. North Dakota, which hadn't seen measles since 2011, was up to 34 cases as of June 6, but has held steady since. Two of the people have been hospitalized. All of the people with confirmed cases were not vaccinated. There were 16 cases in Williams County in western North Dakota on the Montana border. On the eastern side of the state, there were 10 cases in Grand Forks County and seven cases in Cass County. Burke County, in northwest North Dakota on the border of Saskatchewan, Canada, had one case. Measles cases also have been reported this year in Alaska, Arkansas, California, District of Columbia, Florida, Hawaii, Indiana, Kentucky, Louisiana, Maryland, Michigan, Minnesota, Missouri, Nebraska, New Jersey, New York, Rhode Island, South Dakota, Vermont, Virginia and Washington. Health officials declared earlier outbreaks in Indiana, Michigan, Ohio and Pennsylvania over after six weeks of no new cases. Tennessee's outbreak also appears to be over. Cases and outbreaks in the U.S. are frequently traced to someone who caught the disease abroad. The CDC said in May that more than twice as many measles have come from outside of the U.S. compared to May of last year. Most of those are in unvaccinated Americans returning home. In 2019, the U.S. saw 1,274 cases and almost lost its status of having eliminated measles. The best way to avoid measles is to get the measles, mumps and rubella vaccine. The first shot is recommended for children between 12 and 15 months old and the second between 4 and 6 years old. Getting another MMR shot as an adult is harmless if there are concerns about waning immunity, the CDC says. People who have documentation of receiving a live measles vaccine in the 1960s don't need to be revaccinated, but people who were immunized before 1968 with an ineffective vaccine made from 'killed' virus should be revaccinated with at least one dose, the agency said. People who have documentation that they had measles are immune and those born before 1957 generally don't need the shots because so many children got measles back then that they have 'presumptive immunity.' Measles has a harder time spreading through communities with high vaccination rates — above 95% — due to 'herd immunity.' But childhood vaccination rates have declined nationwide since the pandemic and more parents are claiming religious or personal conscience waivers to exempt their kids from required shots. Measles first infects the respiratory tract, then spreads throughout the body, causing a high fever, runny nose, cough, red, watery eyes and a rash. The rash generally appears three to five days after the first symptoms, beginning as flat red spots on the face and then spreading downward to the neck, trunk, arms, legs and feet. When the rash appears, the fever may spike over 104 degrees Fahrenheit, according to the CDC. Most kids will recover from measles, but infection can lead to dangerous complications such as pneumonia, blindness, brain swelling and death. There's no specific treatment for measles, so doctors generally try to alleviate symptoms, prevent complications and keep patients comfortable.

USA Today

6 hours ago

• USA Today

The best summer AC temperature? Experts have an unpopular answer.

To save energy and money, experts say to set your thermostat to 78 degrees Fahrenheit when you wake up. Here's why. Summer 2025 is here and temperatures are reaching dangerous levels, making air conditioning important for comfort and safety. But what temperature should you set your thermostat at? The answer is a balancing act between energy savings, comfort and safety. 'It is essential to stay cool during hot weather — use air conditioning or go to a cool place where you feel comfortable,' Dr. Michelle Morse, New York City's acting health commissioner, said in a statement. 'Heat is dangerous, but taking certain precautions can prevent illness and protect your health.' People also have bills to pay as AC demand skyrockets. Here are ways to stay cool while balancing budgets. Summer 2025 brings killer heat. Here are some surprising ways to stay safe. What's the best temperature to set your AC? The best temperature to set your air conditioning is 78 degrees Fahrenheit when you wake up, according to the U.S. Environmental Protection Agency's Energy Star program. Energy companies in Florida, Maryland and Missouri also recommend thermostats at 78 degrees during summer months. Not many people follow this recommendation, as a 2021 Consumer Reports survey showed. And a 2024 poll from the Detroit Free Press, part of the USA TODAY Network, found 72 degrees was a favorite among readers. But setting your thermostat at a higher temperature can maximize efficiency. What temperature should the thermostat be when I sleep during summer? As temperatures ideally drop at night, people should set thermostats 4 degrees warmer when they go to sleep. If you're away from home, you can avoid unnecessary energy usage by setting temperatures 7 degrees warmer, the energy department said. Even 7 to 10 degrees, for around 8 hours daily, can save up to 10% annually on cooling and heating. Other summer energy tips There are other methods to stay cool, which USA TODAY compiled here. You should also check on others who may be more vulnerable to heat-related illness, including young children, older people and people with chronic health issues. If it gets too hot, look for a nearby cooling center. Even public areas, such as malls, museums or pools, can give critical respite. Contributing: Jeanine Santucci and Greta Cross, USA TODAY. Eduardo Cuevas is based in New York City. Reach him by email at emcuevas1@ or on Signal at emcuevas.01.

USA Today

10 hours ago

• USA Today

The best summer thermostat temperature? Experts have an unpopular answer.

To save energy and money, experts say to set your thermostat to 78 degrees Fahrenheit when you wake up. Here's why. Summer 2025 is here and temperatures are reaching dangerous levels, making air conditioning important for comfort and safety. But what temperature should you set your thermostat at? The answer is a balancing act between energy savings, comfort and safety. 'It is essential to stay cool during hot weather — use air conditioning or go to a cool place where you feel comfortable,' Dr. Michelle Morse, New York City's acting health commissioner, said in a statement. 'Heat is dangerous, but taking certain precautions can prevent illness and protect your health.' People also have bills to pay as AC demand skyrockets. Here are ways to stay cool while balancing budgets. Summer 2025 brings killer heat. Here are some surprising ways to stay safe. What's the best temperature to set your AC? The best temperature to set your air conditioning is 78 degrees Fahrenheit when you wake up, according to the U.S. Environmental Protection Agency's Energy Star program. Energy companies in Florida, Maryland and Missouri also recommend thermostats at 78 degrees during summer months. Not many people follow this recommendation, as a 2021 Consumer Reports survey showed. And a 2024 poll from the Detroit Free Press, part of the USA TODAY Network, found 72 degrees was a favorite among readers. But setting your thermostat at a higher temperature can maximize efficiency. What temperature should the thermostat be when I sleep during summer? As temperatures ideally drop at night, people should set thermostats 4 degrees warmer when they go to sleep. If you're away from home, you can avoid unnecessary energy usage by setting temperatures 7 degrees warmer, the energy department said. Even 7 to 10 degrees, for around 8 hours daily, can save up to 10% annually on cooling and heating. Other summer energy tips There are other methods to stay cool, which USA TODAY compiled here. You should also check on others who may be more vulnerable to heat-related illness, including young children, older people and people with chronic health issues. If it gets too hot, look for a nearby cooling center. Even public areas, such as malls, museums or pools, can give critical respite. Contributing: Jeanine Santucci and Greta Cross, USA TODAY. Eduardo Cuevas is based in New York City. Reach him by email at emcuevas1@ or on Signal at emcuevas.01.