Both too little and too much sleep bad for the heart: study

When it comes to what's best for their hearts, people walk a fine line between getting too much and too little sleep, a new study suggests. Adults who get fewer than six hours or more than eight hours of sleep a night are at greater risk for a variety of heart conditions, according to research led by Dr. Rohit Arora, chairman of cardiology at the Chicago Medical School. Sleeping too little puts people at significantly higher risk of stroke, heart attack and congestive heart failure, the researchers found. On the other hand, people who sleep too much have a higher prevalence of chest pain (angina) and coronary artery disease, a narrowing of the blood vessels that supply the heart with blood and oxygen. The findings are scheduled for presentation at the American College of Cardiology annual meeting in Chicago