Abstract
Background Sleep-disordered breathing, particularly central sleep apnea (CSA), is highly prevalent in heart failure (HF) and an independent prognostic marker. We assessed the hypothesis that an increased hypoxemic burden during sleep may have greater prognostic value than the frequency of apneic and hypopneic episodes. Methods and Results We prospectively conducted overnight cardiorespiratory polygraphy on consecutive HF patients referred to our hospital from 2008 to 2011. We studied CSA defined by an apnea-hypopnea index (AHI) of ≥5 events/h with >75% of all events being central in origin. We determined the AHI, proportion of the sleep time with SpO2 <90% (T90%), and proportion of the recording time that 4% desaturation events occurred (4%POD). We studied 112 HF patients with either systolic or diastolic dysfunction. During a follow-up period of 37 ± 25 months, 32 patients (29%) died. Nonsurvivors had a higher 4%POD compared with survivors (11 ± 6.4% vs 19 ± 13%; P = .001), but did not differ significantly from survivors regarding AHI and T90%. An adjusted logistic regression analysis revealed that the 4%POD was the best independent predictor of mortality. Conclusions The 4%POD, a novel metric for the nocturnal hypoxemic burden, is an independent prognostic marker in HF patients affected by CSA.
| Original language | English |
|---|---|
| Pages (from-to) | 131-137 |
| Number of pages | 7 |
| Journal | Journal of Cardiac Failure |
| Volume | 23 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 01-02-2017 |
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All Science Journal Classification (ASJC) codes
- Cardiology and Cardiovascular Medicine
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Prognostic Importance of Novel Oxygen Desaturation Metrics in Patients With Heart Failure and Central Sleep Apnea. / Watanabe, Eiichi; Kiyono, Ken; Matsui, Shojiro; Somers, Virend K.; Sano, Kan; Hayano, Junichiro; Ichikawa, Tomohide; Kawai, Mayumi; Harada, Masahide; Ozaki, Yukio.
In: Journal of Cardiac Failure, Vol. 23, No. 2, 01.02.2017, p. 131-137.Research output: Contribution to journal › Article
TY - JOUR
T1 - Prognostic Importance of Novel Oxygen Desaturation Metrics in Patients With Heart Failure and Central Sleep Apnea
AU - Watanabe, Eiichi
AU - Kiyono, Ken
AU - Matsui, Shojiro
AU - Somers, Virend K.
AU - Sano, Kan
AU - Hayano, Junichiro
AU - Ichikawa, Tomohide
AU - Kawai, Mayumi
AU - Harada, Masahide
AU - Ozaki, Yukio
PY - 2017/2/1
Y1 - 2017/2/1
N2 - Background Sleep-disordered breathing, particularly central sleep apnea (CSA), is highly prevalent in heart failure (HF) and an independent prognostic marker. We assessed the hypothesis that an increased hypoxemic burden during sleep may have greater prognostic value than the frequency of apneic and hypopneic episodes. Methods and Results We prospectively conducted overnight cardiorespiratory polygraphy on consecutive HF patients referred to our hospital from 2008 to 2011. We studied CSA defined by an apnea-hypopnea index (AHI) of ≥5 events/h with >75% of all events being central in origin. We determined the AHI, proportion of the sleep time with SpO2 <90% (T90%), and proportion of the recording time that 4% desaturation events occurred (4%POD). We studied 112 HF patients with either systolic or diastolic dysfunction. During a follow-up period of 37 ± 25 months, 32 patients (29%) died. Nonsurvivors had a higher 4%POD compared with survivors (11 ± 6.4% vs 19 ± 13%; P = .001), but did not differ significantly from survivors regarding AHI and T90%. An adjusted logistic regression analysis revealed that the 4%POD was the best independent predictor of mortality. Conclusions The 4%POD, a novel metric for the nocturnal hypoxemic burden, is an independent prognostic marker in HF patients affected by CSA.
AB - Background Sleep-disordered breathing, particularly central sleep apnea (CSA), is highly prevalent in heart failure (HF) and an independent prognostic marker. We assessed the hypothesis that an increased hypoxemic burden during sleep may have greater prognostic value than the frequency of apneic and hypopneic episodes. Methods and Results We prospectively conducted overnight cardiorespiratory polygraphy on consecutive HF patients referred to our hospital from 2008 to 2011. We studied CSA defined by an apnea-hypopnea index (AHI) of ≥5 events/h with >75% of all events being central in origin. We determined the AHI, proportion of the sleep time with SpO2 <90% (T90%), and proportion of the recording time that 4% desaturation events occurred (4%POD). We studied 112 HF patients with either systolic or diastolic dysfunction. During a follow-up period of 37 ± 25 months, 32 patients (29%) died. Nonsurvivors had a higher 4%POD compared with survivors (11 ± 6.4% vs 19 ± 13%; P = .001), but did not differ significantly from survivors regarding AHI and T90%. An adjusted logistic regression analysis revealed that the 4%POD was the best independent predictor of mortality. Conclusions The 4%POD, a novel metric for the nocturnal hypoxemic burden, is an independent prognostic marker in HF patients affected by CSA.
UR - http://www.scopus.com/inward/record.url?scp=84999635761&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84999635761&partnerID=8YFLogxK
U2 - 10.1016/j.cardfail.2016.09.004
DO - 10.1016/j.cardfail.2016.09.004
M3 - Article
C2 - 27615064
AN - SCOPUS:84999635761
VL - 23
SP - 131
EP - 137
JO - Journal of Cardiac Failure
JF - Journal of Cardiac Failure
SN - 1071-9164
IS - 2
ER -