Continuous Positive Airway Pressure Reduces Night-Time Blood Pressure and Heart Rate in Patients With Obstructive...

Area of Science:

• Cardiology
• Pulmonology
• Endocrinology

Background:

• Resistant hypertension (RH) frequently coexists with obstructive sleep apnea (OSA).
• Leptin, a key metabolic regulator, has been implicated in cardiovascular health.
• Understanding the interplay between OSA, leptin, and RH is crucial for effective management.

Purpose of the Study:

• To investigate the impact of OSA on leptin profiles in RH patients.
• To evaluate the effect of continuous positive airway pressure (CPAP) on leptin levels, metabolic parameters, and blood pressure (BP) in RH patients with OSA.

Main Methods:

• A case-control study compared RH patients with and without OSA.
• A randomized, single-blind trial involved RH patients with OSA receiving either sham CPAP or active CPAP.
• Leptin levels, metabolic parameters, sympathetic activity markers, and BP indices were assessed.

Main Results:

• RH patients with OSA were predominantly male, with higher rates of metabolic syndrome and elevated creatinine.
• Leptin concentrations were lower in RH patients with OSA but increased after 6 months of CPAP.
• Effective CPAP significantly reduced nighttime systolic BP and heart rate compared to sham CPAP.

Conclusions:

• The co-occurrence of OSA and RH identifies a specific phenotype, often male, with increased metabolic burden.
• While CPAP may lower nighttime BP and heart rate, it did not significantly alter metabolic or sympathetic markers in this study.
• Further research is needed to elucidate the full impact of CPAP on metabolic and cardiovascular parameters in RH patients with OSA.