Overindulging in alcohol appeared to increase the risk of a certain heart rhythm disorder, research shows. The men in the study who were moderate to heavy drinkers experienced an increase in risk for atrial fibrillation, a heart rhythm disturbance that increases the risk of stroke.

Although some studies have revealed that consuming a small amount of alcohol each day may be healthful for certain groups of people, there is a fine line when it comes to alcohol consumption and health. As a general rule, men should drink no more than 2 alcoholic drinks per day to achieve optimum RealAge benefits; women should consume no more than 1 drink per day. Drinking too much alcohol can increase the risk of serious conditions, such as liver disease, cancer, and -- according to new research -- heart arrhythmias in men. Approximately 2.2 million Americans suffer from atrial fibrillation, a heart rhythm disturbance that causes the upper chambers of the heart to quiver. This, in turn, decreases the heart's ability to pump blood. People with atrial fibrillation are at increased risk of developing blood clots and stroke.