“The key here is that there is a lot of undiagnosed sleep apnea, and that, at least in men, it is associated with the development of coronary heart disease and heart failure. Only about 10 percent of sleep apnea cases are diagnosed, ” said Dr. Daniel Gottlieb, associate professor of medicine, Boston University School of Medicine.

According to background information in the study, sleep apnea sufferers awaken suddenly during the night struggling to breathe, often experiencing a shot of blood pressure- raising adrenaline. Most often, they go right back to sleep, unaware of what happened. But the awakenings are repeated, sometimes up to 30 times an hour, depriving the sufferer of vital oxygen and sound sleep.

The study found that men between 40 and 70 years of age who had severe sleep apnea were 68 percent more likely to develop heart disease, and 58 percent more likely to develop heart failure, than those without the condition. Increasing severity of sleep apnea was also associated with obesity, high blood pressure, hypertension and diabetes, all of which are known contributors to heart disease.

According to the U.S. National Institutes of Health, approximately 14 million Americans suffer from coronary heart disease, the most common cause of death in the United States

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