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  • Title: Impairment of pulmonary diffusion correlates with hypoxemic burden in central sleep apnea heart failure patients.
    Author: Fox H, Koerber B, Bitter T, Horstkotte D, Oldenburg O.
    Journal: Respir Physiol Neurobiol; 2017 Sep; 243():7-12. PubMed ID: 28467884.
    Abstract:
    PURPOSE: Central sleep apnea (CSA) and Cheyne-Stokes respiration (CSR) are highly prevalent in heart failure (HF) and are linked to increased mortality. Impaired pulmonary diffusion capacity [DLCO] and [KCO]) have been suggested to play a key role in CSA-CSR pathophysiology. This study investigated the relationship between HF, CSR, DLCO and KCO in well-characterized HF patients. METHODS: This prospective study included HF patients with CSR, all patients underwent full overnight polysomnography (PSG) and lung function testing. RESULTS: A total of 100 patients were included (age 70.7±9.7years, 95% male, body mass index 28.9±5.3kg/m2, left ventricular ejection fraction 33.5±7.7%, New York Heart Association class III 65%. DLCO and oxygenation were significantly correlated with hypoxemic burden (p<0.05). Mean oxygen saturation, oxygen desaturation, C-reactive protein level and pH were significantly associated with CSA-CSR severity (p<0.05). CONCLUSION: The finding that lung diffusion capacity is significantly associated with hypoxemic burden in HF patients with CSA-CSR highlights the important of lung function in HF patients.
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