Regular Dental Flossing Linked to Lower Risk of Stroke & Irregular Heartbeats

The AHA! Team — Wed, 09 Apr 2025 05:27:39 +0000

American Heart Association via News-Medical – Flossing your teeth at least once a week (regular dental flossing) may be linked to a lower risk of stroke Flossing your teeth at least once a week may be linked to a lower risk of stroke caused by a blood clot blocking brain blood flow and irregular heartbeats, according to a preliminary study to be presented at the American Stroke Association’s International Stroke Conference 2025. The meeting is in Los Angeles, Feb. 5-7, 2025, and is a world premier meeting for researchers and clinicians dedicated to the science of stroke and brain health. A recent global health report revealed that oral diseases – such as untreated tooth decay and gum disease – affected 3.5 billion people in 2022, making them the most widespread health conditions. We aimed to determine which oral hygiene behavior – dental flossing, brushing or regular dentist visits – has the greatest impact on stroke prevention.” Souvik Sen, M.D., M. S., M.P.H, study lead author, chair of the Department of Neurology, Prisma Health Richland Hospital and the University of South Carolina School of Medicine in Columbia, South Carolina A structured questionnaire of more than 6,000 people The Atherosclerosis Risk in Communities (ARIC) study, one of the first large-scale investigations of this kind in the U.S., assessed the home use of dental floss through a structured questionnaire of more than 6,000 people. Among those who reported flossing, 4,092 had not experienced a stroke, and 4,050 had not been diagnosed with an irregular heartbeat known as atrial fibrillation (AFib). Participants were asked about their status regarding high blood pressure, diabetes, high cholesterol, smoking, body mass index, education, regular brushing and dentist visits. During the 25 years of follow-up, 434 participants were identified as having strokes, of which 147 were larger artery brain clots, 97 were heart-driven clots and 95 were hardening of the smaller arteries. Additionally, 1,291 participants were noted to have experienced AFib. The analysis found: Flossing was associated with a 22% lower risk of ischemic stroke, 44% lower risk of cardioembolic stroke (blood clots traveling from the heart) and 12% lower risk of AFib. The associated lower risk was independent of regular brushing and routine dental visits or other oral hygiene behaviors. Increasing the frequency of flossing had a greater chance of stroke risk reduction. Flossing was also associated with a lower chance of cavities and periodontal disease. Researchers were surprised by the reduction of irregular heartbeats, or AFib. AFib is the most common form of irregular heartbeat. It can lead to stroke, heart failure or other cardiovascular complications. More than 12 million people are projected to have AFib in the United States by 2030, according to the American Heart Association’s 2025 Heart Disease and Stroke Statistics. “Oral health behaviors are linked to inflammation and artery hardening. Flossing may reduce stroke risk by lowering oral infections and inflammation and encouraging other healthy habits,” Sen said. “Many people have expressed that dental care is costly. Flossing is a healthy habit that is easy to adopt, affordable and accessible everywhere.” Study limitations Study limitations include that data were based on answers to a questionnaire, and the 25-year follow-up appears to have focused on stroke and heart outcomes only. There was no follow-up concerning flossing or other oral behaviors over the years, Sen said. “This study offers more insights into the specific dental health behaviors that may be linked to stroke risks and potential risk reduction. With further research, dental health practices could possibly be incorporated into the “Life’s Essential 8″ risk factors, which include diet, physical activity, nicotine exposure, sleep, body mass index, blood pressure, blood glucose and blood lipids,” said Daniel T. Lackland, Dr.P.H., FAHA, American Heart Association EPI and Stroke Council member and professor of epidemiology and director of the Division of Translational Neurosciences and Population Studies in the department of neurology at the Medical University of South Carolina in Charleston. Lackland was not involved in this study. Study background, and details: The study began in 1987 and is ongoing. Of the 6,258 participants, 82% were self-reported white adults and 18% Black adults. Their average age was 62 years and 55% were women. Potential participants were excluded if they had total tooth loss, dental implants, heart disease, organ transplant, artificial joints, implanted heart valve or stent or major surgery. Source: American Heart Association To read the original article click here.

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High Caffeine Consumption Disrupts Heart Rhythms in Middle-aged Rats

AHA Publisher — Wed, 06 Apr 2022 07:00:57 +0000

American Physiological Society (APS) via Newswise – Philadelphia (April 2, 2022)—The Food and Drug Administration recommends healthy adults not exceed 400 milligrams (mg) of caffeine—approximately four cups of brewed coffee—a day. New research out of the New York Institute of Technology finds that staying within these guidelines is more important as people age. The study will be presented this week at the American Physiological Society (APS) annual meeting at Experimental Biology (EB) 2022 in Philadelphia. “The older rats are more vulnerable than younger rats to caffeine induced ventricular tachyarrhythmias,” researchers wrote. The research team administered an acute dose of caffeine to four experimental groups of younger (5-month-old) and middle-aged (1-year-old) male and female rats. They also gave saline to control groups of the younger rats. The team then monitored the rats’ heart rhythms via electrocardiogram. Although there is no concrete age conversion of rats to humans, a 5-month-old rat can be considered the rough equivalent of a young adult human. At one year, rats are approximately comparable to early middle age. While similarly, there is no precise conversion for a human equivalent to the rats’ caffeine dose, a starting estimate would be about 13 mg per kilogram of weight—about 880 mg for a person weighing 150 pounds. After ingesting the caffeine, all except one of the males and all the female middle-aged rats developed ventricular arrhythmias—i.e., abnormal rhythms in the lower chambers of their hearts. Only two younger males and one female developed abnormal heart rhythms. None of the controls developed abnormal rhythms. These abnormal heart rhythms are temporary, but can hold serious health risks which increase with frequency of the episodes. Heart arrhythmia can cause lightheadedness, loss of consciousness and cardiac arrest. “It would be wise to consume caffeine in moderation,” the researchers advised. To read the original article click here.

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Regular Dental Flossing Linked to Lower Risk of Stroke & Irregular Heartbeats

High Caffeine Consumption Disrupts Heart Rhythms in Middle-aged Rats