Two new, basic animal research studies shed light on alcohol consumption and the heart. The first study may help explain why binge drinking sometimes causes an irregular heartbeat and a possible way to prevent it. The second study investigated why alcohol may have a negative impact on heart function in women taking estrogen replacement therapy.

Both studies are preliminary research on posters presented at the American Heart Association's Basic Cardiovascular Sciences Scientific Sessions 2024. The meeting is in Chicago, July 22–25, 2024, and offers the latest research on innovations and discovery in cardiovascular science. Binge drinking (five drinks within two hours for men and four drinks within two hours for women) is common around the world.

Recent research has also found the incidence of atrial fibrillation (AFib), the most common type of irregular heart rhythm or arrhythmia, continues to rise, according to the study. "Around the holidays, opportunities for celebration – often accompanied by heavy drinking – occur during a brief period of time. Unfortunately, this sometimes sends revelers, even those with no previous heart condition, to the hospital with a racing or abnormally beating heart," said Saugat Khanal, Ph.

D., lead author of the study and a post-doctoral scholar in the department of physiology & cell biology at The Ohio State University College of Medicine in Columbus, Ohio. "Our study in mice explored the mechanism of alcohol-induced arrhythmia and a possi.