Platelet Activation and Circadian Rhythms of Clotting-Fibrinolysis Factors in Patients With Sleep Apnea Syndrome
Recruitment status was Recruiting
The objective of the study is to define and compare clotting- fibrinolysis patterns, platelet function markers and endothelial dysfunction in patients with SAHS before and after treatment and normal controls age and weight matched.
Device: CPAP (Continuous Positive Airway Pressure)
|Study Design:||Allocation: Non-Randomized
Endpoint Classification: Safety/Efficacy Study
Intervention Model: Parallel Assignment
Masking: Open Label
Primary Purpose: Prevention
|Official Title:||Platelet Activation and Circadian Rhythms of Clotting-Fibrinolysis Factors in Patients With Sleep Apnea Syndrome. Implications in the Precipitation of Cardiovascular Events|
- To define and compare clotting- fibrinolysis patterns, platelet function markers and endothelial dysfunction
- CPAP (Continuous Positive Airway Pressure) effect on studied variables
|Study Start Date:||February 2007|
The hypothesis of the study is the following: Patients with sleep apnea-hypopnea syndrome have higher risk of cardiovascular mortality during the night.
Respiratory alterations (hypoxia, hypoxia- reoxygenation) that these patients suffer during the sleep may induce modifications in platelet function, clotting-fibrinolysis factors and endothelial function, that may accelerate cardiovascular events during the night
DESIGN: Prospective and controlled study
METHODS: 20 SAHS patients and 20 controls will be studied. The study includes:
a) medical history; b) anthropometric variables (weight, height, body mass index, waist-hip ratio); c) sleepiness tested by Epworth scale; d) conventional polysomnography (PSG); e) testing every 4 hours for a 24 hours period: clotting-fibrinolysis factors (factor V, VII, VIII; C and S protein, plasminogen tissular activator (t-PA) and inhibitor of plasminogen activator (PAI-1); platelet activation markers (CD62, CD63 and GPIIb/IIIa) and endothelial dysfunction markers (endothelins, nitrites/nitrates and asymmetrical dimethyl-arginine); f) basic biochemical profile and hemogram. Patients will be revaluated after 6 months of CPAP treatment.
|Contact: Antonia Barceló, MD||34 971 email@example.com|
|Hospital Universitario Son Dureta||Recruiting|
|Palma de Mallorca, Baleares, Spain, 07014|
|Principal Investigator:||Antonia Barceló, MD||Hospital Universitario Son Dureta|