Dagga deadly after heart attack
Marijuana users may have a shorter life expectancy after suffering a heart attack than people who do not use the drug, a new study suggests.
With the ageing of the Baby Boomer generation, a growing percentage of Americans are long-time marijuana users. A 2002 national survey found that the number of 45- to 64-year-olds who reported marijuana use was three times higher than it had been 10 years earlier.
In a new study, Dr Kenneth J. Mukamal of the Beth Israel Deaconess Medical Centre in Boston and associates found that these ageing marijuana users may have a poorer prognosis in the years following a heart attack.
Among more than 1,900 heart attack patients the researchers followed, those who reported regularly smoking marijuana in the year before the attack were two to four times more likely to die within the next 4 years.
"Although marijuana use has not been associated with mortality in other populations, it may pose particular risk for susceptible individuals with coronary heart disease," the researchers report in the American Heart Journal.
Marijuana has a number of effects that could be dangerous for older adults with risk factors for a heart attack, according to Mukamal's team.
The drug triggers a spike in resting heart rate, as well an increase in blood pressure. At the same time it speeds heart rate, creating a greater demand for oxygen, it can also limit the body's ability to use oxygen, the researchers explain.
Marijuana smoke exposes users to carbon monoxide, and one study found that the drug may be even worse than cigarettes when it comes to draining heart attack survivors' capacity for exercise.
Mukamal and his colleagues based their findings on 1,913 US men and women who were interviewed within a few days of being hospitalised at 1 or 45 centres for a heart attack. Among other questions, they were asked whether they had smoked marijuana in the past year. Fifty-two patients said they had.
Over the next several years, 317 patients died, with the risk being higher among marijuana users. Those who'd said they smoked less than once a week had 2.5-times the risk of death of compared with non-users, while heavier users had a 4.2-times higher risk of death.
Marijuana users had higher odds of dying from both cardiovascular causes and causes unrelated to their hearts. These elevated risks remained even when Mukamal's team factored in the effects of cigarette smoking, a habit common among marijuana users.
The study "raises concerns" about the risks of marijuana use, particularly for people already at risk of heart attack and stroke, according to an editorial published with the study.
More research is needed into both the short- and long-term effects of marijuana use in older adults and others with heart attack risk factors, writes Dr J. Michael Gaziano of Harvard Medical School.
"In the meantime," he concludes, "it seems advisable to continue to discourage marijuana use in our patients, especially those with known (cardiovascular disease) or risk factors." - (Reuters Health)
More News:
- New equipment approved for heart attack victims,
ago - ESL teacher dies of heart attack while driving car,
ago - Results are in on "ground-breaking" heart attack study,
ago - Vitamin B9 protects heart during and after heart attack,
ago - Blood pressure pill prevents heart attack,
ago - Dagga deadly after heart attack,
ago - Study Shows Drug-Coated Stents Safe Following Heart Attack,
ago - New weapon in heart attack war,
ago - Heart problems can surprise women,
ago - Coronary calcium scanning strongly predicts heart risk -- in all ethnicities, a study finds. But is it cost-effective?,
ago
Read all news...
-
New articles
-
Popular articles
Resuscitation
Cardiopulmonary Resuscitation (CPR)
How to help an unconscious with heart attack?
Prevent Heart Attack moving... in the bed - Free exercises
Calculate your BMI
Calculate your Body Mass Index, see if you are overweight or not
Download a Free ebook
Understand better Heart Attack in 20 articles. Download a copy now!
Heart disease statistics
1.5 million Americans suffer a heart attack each year (that's 1 heart attack every 20 seconds)
Emergency numbers
Do not ignore chest pain or discomfort if you think you might have a Heart Attack. Find the emergency phone numbers worldwide .
Women and Heart Attack
Read more on heart attack in women
Heart Attack in pregnancy
Cholesterol
Where does cholesterol come from?
Heart Attack Risks
10 signs of heart attack
What are the risk factors of heart attack? [video]