Severity of Obstructive Sleep Apnea is Associated with Cardiac Troponin I Concentrations in a Community-based Sample: Data from the Akershus Sleep Apnea Project
| Autor: | Silje K. Namtvedt, Helge Røsjø, Anna Randby, Torbjørn Omland, Harald Hrubos-Strøm, Jon Brynildsen, Gunnar Einvik, Virend K. Somers |
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| Rok vydání: | 2014 |
| Předmět: |
Male
medicine.medical_specialty Polysomnography Body Mass Index Coronary artery disease Physiology (medical) Internal medicine Troponin I Humans Medicine Sleep Apnea Obstructive biology medicine.diagnostic_test business.industry Myocardium Sleep apnea Apnea Middle Aged medicine.disease Troponin respiratory tract diseases Obstructive sleep apnea Cross-Sectional Studies Blood pressure Severity of OSA is Associated with Cardiac Troponin I Cardiology biology.protein Female Neurology (clinical) medicine.symptom Sleep business Biomarkers |
| Zdroj: | Sleep. 37:1111-1116 |
| ISSN: | 1550-9109 0161-8105 |
| Popis: | OBJECTIVES Previous community-based studies have failed to demonstrate an independent association between OSA and circulating cardiac troponin concentrations, a marker of myocardial injury. However, these studies have used troponin assays with modest analytic sensitivity to detect low-level, chronic increments in troponin levels. Using a highly sensitive troponin I (hs-TnI) assay, we tested the hypothesis that the severity of OSA is associated with myocardial injury independently of comorbidities. DESIGN Cross-sectional study. SETTING Community-based. PARTICIPANTS 514 subjects (54% men, age 48 ± 11 y [mean ± SD]). INTERVENTIONS N/A. MEASUREMENTS AND RESULTS hs-TnI concentrations were measured in fasting morning blood samples and 318 participants (62%) had hs-TnI concentration above the limit of detection ([LoD] 1.2 ng/L). The severity of OSA, expressed as the apnea-hypopnea index (AHI) and nocturnal hypoxemia, was assessed by in-hospital polysomnography. After adjustment for age, gender, estimated creatinine clearance, history of coronary artery disease and hypertension, smoking, diabetes mellitus, systolic blood pressure, heart rate, body mass index, left ventricular hypertrophy, and cholesterol ratio in multivariate linear regression models, higher AHI (standardized β = 0.12, P = 0.006), lower mean SpO2 (β = -0.13, P = 0.012) and higher percentage of total sleep time with SpO2 < 90% (β = 0.12, P = 0.011) were all associated with higher hs-TnI levels in separate models. Additional analyses with hs-TnI categorized in tertiles or using a different strategy for persons with hs-TnI levels below the LoD did not change the results. CONCLUSION Increased obstructive sleep apnea (OSA) severity is independently associated with higher concentrations of hs-TnI, suggesting that frequent apneas or hypoxemia in OSA may cause low-grade myocardial injury. |
| Databáze: | OpenAIRE |
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