Moderate-to-severe obstructive sleep apnea is associated with subclinical myocardial injury and impaired hemodynamics in pulmonary hypertension patients

Takashi Kohno, Masaharu Kataoka, Takashi Kawakami, Ryoma Fukuoka, Yuichi Tamura, Mai Kimura, Makoto Takei, Yuichiro Maekawa, Motoaki Sano, Keiichi Fukuda

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Background The clinical significance of obstructive sleep apnea (OSA) in pulmonary hypertension (PH) patients remains unclear. We investigated the hemodynamics and serum troponin T concentrations associated with OSA in PH patients. Methods Cross-sectional study was performed on data from 97 clinically stable PH patients. Using overnight sleep study, we evaluated apnea–hypopnea index (AHI) and divided patients into two groups: none-to-mild OSA (AHI < 15/h, N = 81) and moderate-to-severe OSA (AHI ≥ 15/h, N = 16). Clinical, hemodynamic, and laboratory data were compared with OSA severity. Results Moderate-to-severe OSA patients had higher pulmonary vascular resistance (PVR; 6.5 [5.7–12.9] vs 4.4 [2.9–6.4] Wood units, p = 0.001) and mean pulmonary artery pressure (mPAP; 37 [30–49] vs 30 [22–37] mmHg, p = 0.045), and a lower cardiac index (2.2 [1.6–2.6] vs 2.8 [2.3–3.5] L/min/m2, p = 0.001) than those without. There was no association between plasma B-type natriuretic peptide (BNP) or serum C-reactive protein levels and OSA. However, high-sensitivity troponin T (hs-TnT) level was significantly higher in moderate-to-severe OSA patients (13 [8–18] vs 6 [4–10] ng/L, p < 0.001). The hs-TnT level positively correlated with the plasma BNP level, mPAP, PVR, AHI, obstructive apnea index, and 6-min walking distance. After adjustment for age, estimated glomerular filtration rate, hypertension, smoking, and plasma BNP level, moderate-to-severe OSA was an independent factor for determining the plasma level of log hs-TnT level (β = 0.419, 95% confidence interval 0.119–0.718, p = 0.007). Conclusions Moderate-to-severe OSA is associated with impaired hemodynamics and subclinical myocardial damage in PH patients. Thus, OSA-related myocardial injury may play a role in hemodynamic destabilization with its associated poor prognosis.

Original languageEnglish
Pages (from-to)121-127
Number of pages7
JournalSleep Medicine
Volume30
DOIs
Publication statusPublished - 2017 Feb 1

Keywords

  • Biomarker
  • Pulmonary hypertension
  • Sleep apnea

ASJC Scopus subject areas

  • Medicine(all)

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