Relationship Between Risks for Obstructive Sleep Apnea, Resistant Hypertension, and Aldosterone Among African...

Area of Science:

• Cardiology
• Sleep Medicine
• Endocrinology

Background:

• African Americans exhibit a higher prevalence of resistant hypertension than Caucasians.
• Obstructive sleep apnea (OSA) and elevated aldosterone levels are potential contributors to this racial disparity.
• Understanding these links is crucial for targeted hypertension management.

Purpose of the Study:

• To investigate if obstructive sleep apnea (OSA) risks correlate with aldosterone levels and hypertension status in African Americans.
• To examine how aldosterone levels vary with hypertension severity and control in relation to OSA risks.
• To explore the role of OSA in the higher prevalence of resistant hypertension among African Americans.

Main Methods:

• A cross-sectional analysis of 5,052 African American adults from the Jackson Heart Study was conducted.
• Multivariable regression models were used to assess relationships between OSA risks, aldosterone levels, and hypertension.
• An OSA risk score was developed based on factors like obesity, snoring, and daytime sleepiness.

Main Results:

• Higher OSA risk scores were associated with increased odds of uncontrolled or resistant hypertension.
• Log-aldosterone levels significantly increased with each additional OSA risk factor (P-trend <0.05).
• Aldosterone levels also rose with increasing hypertension severity (P-trend <0.001), peaking in those with resistant hypertension.

Conclusions:

• Obstructive sleep apnea (OSA) risks are positively associated with resistant hypertension in African American adults.
• Elevated aldosterone levels are linked to both OSA risks and hypertension severity in this population.
• These findings suggest OSA and aldosterone play a significant role in resistant hypertension among African Americans.