Research on Snoring and Cardiac Risks

Overview of Snoring and Sleep Apnea

Recent research has focused on individuals who snore and those diagnosed with obstructive sleep apnea (OSA) to assess whether snoring women face a higher risk of cardiac impairment compared to their male counterparts. Loud snoring can disrupt sleep quality, leading to exhaustion and other health concerns. The National Sleep Foundation estimates that over nine million Americans intermittently stop breathing during sleep due to snoring, which can contribute to daytime sleepiness and increased risk of cardiovascular disease. It is crucial for both men and women who snore to recognize this symptom as a potential health warning.

Understanding Sleep Apnea

Not all individuals who snore are diagnosed with sleep apnea. Obstructive sleep apnea is characterized by frequent pauses in breathing, lasting 10 to 20 seconds throughout the night. While snoring is a common symptom, it is not universal among those with sleep apnea. Statistics show that about one in three men and one in five women who snore may develop some form of sleep apnea.

Health Implications of Obstructive Sleep Apnea

Obstructive sleep apnea is the most prevalent type of sleep apnea. Common symptoms include loud snoring, dry mouth upon waking, morning headaches, and irritability. The loud snoring occurs due to the blockage or collapse of the upper airway during sleep, which restricts oxygen flow. This oxygen deprivation can awaken individuals multiple times a night and trigger stress hormones that elevate blood pressure, potentially leading to cardiovascular issues over time.

Gender Differences in Cardiac Risk

Study Findings

A recent study presented at the 104th Scientific Assembly and Annual Meeting of the Radiological Society of North America (RSNA) indicates that snoring women may be at a greater risk of heart disease than snoring men. This research suggests that both obstructive sleep apnea and snoring could lead to earlier cardiac function impairment in women. The study also highlights that obstructive sleep apnea is often underdiagnosed in individuals who snore.

Research Methodology

The researchers analyzed data from the UK Biobank, which tracks the health of 500,000 volunteers. They specifically examined data from 4,877 participants who underwent cardiac imaging, categorizing them into three groups: 118 with obstructive sleep apnea, 1,886 who self-reported snoring, and 2,477 without any snoring or sleep apnea.

Cardiac Function Observations

Findings revealed that both men and women with obstructive sleep apnea and snoring exhibited enlarged left ventricles, indicating that the heart is working harder to pump blood. The study noted an increased ejection fraction in men, demonstrating a higher efficiency in heart function. However, a comparison of the snoring group to those without sleep apnea showed more significant left ventricle enlargement in women, suggesting a heightened risk of heart disease.

Implications for Diagnosis and Treatment

Underdiagnosis of Obstructive Sleep Apnea

The low prevalence of diagnosed obstructive sleep apnea among study participants indicates a critical gap in recognition and treatment. The alterations in cardiac function observed in the snoring group imply that many individuals with self-reported snoring may be suffering from undiagnosed sleep apnea.

Recommendations for Screening

The study’s findings advocate for individuals who snore to seek screening for obstructive sleep apnea. Loud snorers are encouraged to have partners monitor their sleep for signs of noisy breathing or periods of breath cessation. The definitive method for diagnosing sleep apnea remains an overnight sleep study conducted in a sleep clinic.

Treatment Options

Treatment for obstructive sleep apnea varies based on the underlying causes. In some cases, lifestyle changes such as weight loss, reducing alcohol consumption, or altering medication use can improve sleep quality. In more severe cases, surgical interventions or the use of devices that maintain open airways during sleep may be necessary.

Conclusion

Obstructive sleep apnea and snoring are linked to an increased risk of cardiovascular disease, with distinct manifestations in men and women. Women who snore appear more susceptible to cardiac changes and may develop heart disease earlier than men. The study underscores the importance of addressing the underdiagnosis of obstructive sleep apnea. Individuals experiencing loud snoring should consider sleep evaluations to ensure proper treatment, which can enhance heart function and mitigate cardiovascular risks.

Written by Preeti Paul, MS Biochemistry
Reference: “Snoring Poses Greater Cardiac Risk To Women”. Eurekalert!, 2018, https://www.eurekalert.org/pub_releases/2018-11/rson-spg111518.php. Accessed 14 Dec 2018.