Sleep apnoea and hypertension.

Area of Science:

• Cardiology
• Sleep Medicine
• Internal Medicine

Background:

• Arterial hypertension is a significant cardiovascular risk factor.
• Sleep-disordered breathing, particularly obstructive sleep apnea syndrome (OSAS), is increasingly recognized as a contributing factor to hypertension.
• The relationship between OSAS and hypertension requires ongoing investigation and clinical correlation.

Purpose of the Study:

• To review current evidence linking sleep-disordered breathing and arterial hypertension.
• To explore the underlying mechanisms contributing to hypertension in patients with recurrent nocturnal apnoic episodes.
• To discuss the clinical implications for managing hypertensive patients with sleep-disordered breathing and the role of nasal continuous positive air pressure (CPAP).

Main Methods:

• Systematic review and synthesis of recent cross-sectional and longitudinal studies.
• Analysis of experimental animal studies and clinical human studies to elucidate pathophysiological mechanisms.
• Evaluation of treatment strategies, specifically nasal CPAP, for blood pressure reduction.

Main Results:

• Consistent evidence supports a strong association between obstructive sleep apnea syndrome and arterial hypertension.
• Mechanisms involve sympathetic nervous system activation, endothelial dysfunction, and inflammatory pathways.
• Nasal CPAP therapy demonstrates potential for reducing blood pressure in affected individuals.

Conclusions:

• Sleep-disordered breathing is a significant contributor to the development and maintenance of arterial hypertension.
• Understanding the mechanisms provides targets for therapeutic interventions.
• Nasal CPAP is a viable treatment option for lowering blood pressure in hypertensive patients with OSAS.