New research shows that while little sleep can cause heart problems, but too much sleep can cause the same problem. This research, based at the Chicago Medical School, found that adults who get less than 6 hours of sleep and adults who get more than 8 hours of sleep per night are likely to have a higher prevalence of heart problems. The two most common heart complications caused by disproportionate amounts of sleep are chest pains and coronary heart disease. These recent findings show a clear correlation between sleep and heart health and have prompted interest in further implications.