Beneficial effects of adaptive servo-ventilation on natriuretic peptides and diastolic function in acute heart failure patients with preserved ejection fraction and sleep-disordered breathing
Adaptive servo-ventilation (ASV) is a ventilator algorithm able to correct breathing through anticyclic support of breathing in patients with central sleep apnea (CSA). So far, very few data exist regarding the role of ASV on acute heart failure with preserved ejection fraction (HFpEF).
We performed a single-center prospective, randomized, case-control study in consecutive acute HFpEF (left ventricle ejection fraction, LVEF ≥ 45%) patients with sleep-disordered breathing (SDB, apnea–hypopnea index, AHI > 15/h) and prevalence of CSA.
We included ten consecutive patients randomized for ASV on top of standard therapy for acute heart failure (group 1) versus standard care alone (group 2). ASV therapy significantly reduced AHI and CSA. An improvement in cardiac diastolic function was seen in group 1 compared to group 2 (E/E’ 17.5 to 9.6, p < 0.02 vs 18.5 to 14.5, p = 0.4). Brain natriuretic peptide (BNP) markedly decreased in cases, but not in controls (298 to 84 pg/ml, p < 0.02 vs 280 to 120 pg/ml, p = 0.06). Right ventricle (RV) function significantly improved in group 1, differently from group 2.
An acute use of ASV seems effective in reducing BNP and improving diastolic and RV function in acute HFpEF patients with SDB and CSA, compared to standard treatment.
KeywordsHeart failure with preserved ejection fraction Central sleep apnea Diastolic function Right ventricle Adaptive servo-ventilation
We would like to thank FROM (Fondazione per la Ricerca Ospedale di Bergamo) and Dr. A. Gavazzi for his clinical support.
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflict of interest.
All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
Written informed consent was obtained from all individual participants included in the study.
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