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How does sleep apnea affect the heart? - Harvard Health

How does sleep apnea affect the heart? #HarvardHealth

9/16/2020 6:00:00 PM

How does sleep apnea affect the heart? HarvardHealth

Obstructive sleep apnea, which causes loud snoring and periodic breathing pauses during the night, is closely linked to cardiovascular disease.

Ask the doctorPublished: September, 2020Q.My husband is reluctant to get tested for sleep apnea. But I'm pretty sure that he has it, and I'm concerned because I've heard that it can contribute to heart disease. How are these two conditions connected?

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A.As you likely know already, people with sleep apnea may snore loudly and may also periodically gasp for breath throughout the night. These explosive snorts often wake up bed partners or roommates — although not necessarily the person with apnea.Obstructive sleep apnea (as the condition is officially called) occurs when tissue in the tongue or the throat temporarily obstructs the airway during sleep, sometimes as many as 30 times per hour. The condition affects people of all ages and sizes, but it is most common in men over 40 who are overweight or obese. And you are correct: it is closely linked to cardiovascular disease.

Here's why: Each time a person with sleep apnea stops breathing, the body's oxygen level drops. The body reacts by producing epinephrine (also called adrenaline), a stress hormone. Over time, high adrenaline levels can contribute to high blood pressure. Repeated surges in blood pressure levels can damage the lining of the blood vessels, and sleep disturbances can also raise levels of harmful LDL cholesterol and other blood fats. These changes may lead to clogged arteries and poor heart muscle function. People with untreated sleep apnea are twice as likely to have a heart attack compared with those who don't have the disorder.

One way doctors assess the likelihood of sleep apnea is a with the STOPBANG test, at left. But a definitive diagnosis requires a sleep study.Sleep apnea test: STOPBANGA"yes" answer to three or more of these questions suggests possible sleep apnea. Ask your doctor if you should have a sleep study.

SHave you been told that you snore?TDo you often feel tired during the day?OObstruction:Do you know if you briefly stop breathing while asleep, or has anyone witnessed you do this?PDo you have high blood pressure or take medication for high blood pressure?

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