title: Adaptive servo-ventilation therapy improves cardiac sympathetic nerve activity, cardiac function, exercise capacity, and symptom in patients with chronic heart failure and Cheyne-Stokes respiration.
abstract: Adaptive servo-ventilation (ASV) therapy has been reported to be effective for improving central sleep apnea (CSA) and chronic heart failure (CHF). The purpose of this study was to clarify whether ASV is effective for CSA, cardiac sympathetic nerve activity (CSNA), cardiac symptoms/function, and exercise capacity in CHF patients with CSA and Cheyne-Stokes respiration (CSR-CSA).
  
  
  
  In this study, 31 CHF patients with CSR-CSA and a left ventricular ejection fraction (LVEF) ≤ 40% were randomized into an ASV group and a conservative therapy (non-ASV) group for 6 month. Nuclear imagings with123I-Metaiodobenzylguanidine (MIBG) and99mTc-Sestamibi were performed. Exercise capacity using a specific activity scale (SAS) and the New York Heart Association (NYHA) class were evaluated. CSNA was evaluated by123I-MIBG imaging, with the delayed heart/mediastinum activity ratio (H/M), delayed total defect score (TDS), and washout rate (WR).
  
  
  
  The ASV group had significantly better (P < .05) results than the non-ASV group with respect to the changes of AHI (-20.8 ± 14.6 vs -0.5 ± 8.1), TDS (-7.9 ± 4.3 vs 1.4 ± 6.0), and H/M(0.16 ± 0.16 vs -0.04 ± 0.10) on123I-MIBG imaging, as well as the changes of LVEF (5.3 ± 3.9% vs 0.7 ± 32.6%), SAS (1.6 ± 1.4 vs 0.3 ± 0.7), and NYHA class (2.2 ± 0.4 vs 2.7 ± 0.5) after 6-month therapy.
  
  
  
  Performing ASV for 6 months achieved improvement of CSR-CSA, CSNA, cardiac symptoms/function, and exercise capacity in CHF patients with CSR-CSA.
authors.affiliation: Toyama Cardiovasucular Clinic, 2-33-9, Aramaki-machi, Maebashi, Gunma, 371-0044, Japan. t.toyama@toyama-clinic.jp.
authors.forename: Takuji
authors.initials: T
authors.lastname: Toyama
authors.affiliation: Gunma Prefectural Cardiovascular Center, Maebashi, Japan.
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Hoshizaki
authors.affiliation: Department of Cardiovascular Medicine, Gunma University School of Medicine, Maebashi, Japan.
authors.forename: Shu
authors.initials: S
authors.lastname: Kasama
authors.affiliation: Gunma Prefectural Cardiovascular Center, Maebashi, Japan.
authors.forename: Yusuke
authors.initials: Y
authors.lastname: Miyaishi
authors.affiliation: Gunma Prefectural Cardiovascular Center, Maebashi, Japan.
authors.forename: Hakuken
authors.initials: H
authors.lastname: Kan
authors.affiliation: Gunma Prefectural Cardiovascular Center, Maebashi, Japan.
authors.forename: Eiji
authors.initials: E
authors.lastname: Yamashita
authors.affiliation: Gunma Prefectural Cardiovascular Center, Maebashi, Japan.
authors.forename: Ren
authors.initials: R
authors.lastname: Kawaguti
authors.affiliation: Gunma Prefectural Cardiovascular Center, Maebashi, Japan.
authors.forename: Hitoshi
authors.initials: H
authors.lastname: Adachi
authors.affiliation: Gunma Prefectural Cardiovascular Center, Maebashi, Japan.
authors.forename: Shigeru
authors.initials: S
authors.lastname: Ohsima
mesh_terms: D019797:3-Iodobenzylguanidine; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002639:Cheyne-Stokes Respiration / Q000000981:diagnostic imaging / Q000503:physiopathology / Q000628:therapy*; D002908:Chronic Disease; D015444:Exercise; D005260:Female; D006321:Heart / Q000294:innervation* / Q000503:physiopathology; D006333:Heart Failure / Q000000981:diagnostic imaging / Q000503:physiopathology / Q000628:therapy*; D006801:Humans; D008297:Male; D008875:Middle Aged; D012121:Respiration, Artificial / Q000379:methods*; D013564:Sympathetic Nervous System / Q000503:physiopathology*
chemical_list: D019797:3-Iodobenzylguanidine
keywords: Adaptive servo-ventilation; cardiac sympathetic nerve activity; chronic heart failure and cheyne-Stokes respiration