Hospitalization for acute decompensated HF within previous 30 days
Hospitalization for myocardial infarction or cardiac surgery within previous 90 days
Presence of a left ventricular assist device
History of heart transplantation
Poorly controlled hypertension (>170/>110)
Poorly controlled diabetes (HbA1c > 9.0)
Severe renal failure with estimated glomerular filtration rate <30 ml/min
Prior stroke with functional impairment or other severe, uncontrolled medical problems that may impair ability to participate in the study exams, based on medical history and review of medical records
Severe chronic insomnia, with reported usual sleep duration <4 hours
Severe daytime sleepiness, defined as Epworth Sleepiness Scale score 18 or higher or a report of falling asleep driving during the previous year, and deemed a safety risk by study physician
Awake resting oxyhemoglobin saturation <89%
Pregnancy
Smoking by subject or other person in the subject's bedroom, or other open flame in bedroom
Current use of a positive airway pressure device (including continuous or bi-level positive airway pressure or adaptive servo-ventilation) or supplemental oxygen therapy

NCT01807897_exc_T1
Observation
Hospitalization
NCT01807897_exc_T2
Condition
acute decompensated HF
NCT01807897_exc_T3
Temporal
within previous 30 days
NCT01807897_exc_T4
Observation
Hospitalization
NCT01807897_exc_T5
Condition
myocardial infarction
NCT01807897_exc_T6
Procedure
cardiac surgery
NCT01807897_exc_T7
Temporal
within previous 90 days
NCT01807897_exc_T8
Scope
myocardial infarction or cardiac surgery
NCT01807897_exc_T9
Device
left ventricular assist device
NCT01807897_exc_T10
Procedure
heart transplantation
NCT01807897_exc_T11
Condition
hypertension
NCT01807897_exc_T12
Qualifier
Poorly controlled
NCT01807897_exc_T13
Condition
diabetes
NCT01807897_exc_T14
Qualifier
Poorly controlled
NCT01807897_exc_T15
Measurement
HbA1c
NCT01807897_exc_T16
Value
> 9.0
NCT01807897_exc_T17
Condition
renal failure
NCT01807897_exc_T18
Qualifier
Severe
NCT01807897_exc_T19
Measurement
estimated glomerular filtration rate
NCT01807897_exc_T20
Value
<30 ml/min
NCT01807897_exc_T21
Condition
stroke
NCT01807897_exc_T22
Condition
functional impairment
NCT01807897_exc_T24
Condition
chronic insomnia
NCT01807897_exc_T25
Observation
sleep duration
NCT01807897_exc_T26
Value
<4 hours
NCT01807897_exc_T27
Condition
daytime sleepiness
NCT01807897_exc_T28
Measurement
Epworth Sleepiness Scale
NCT01807897_exc_T29
Value
score 18 or higher
NCT01807897_exc_T31
Measurement
oxyhemoglobin saturation
NCT01807897_exc_T32
Qualifier
resting
NCT01807897_exc_T33
Qualifier
Awake
NCT01807897_exc_T34
Value
<89%
NCT01807897_exc_T35
Condition
Pregnancy
NCT01807897_exc_T37
Device
positive airway pressure device
NCT01807897_exc_T38
Device
bi-level positive airway pressure
NCT01807897_exc_T39
Device
 bi-leve re or adaptive
NCT01807897_exc_T40
Device
adaptive servo-ventilation
NCT01807897_exc_T41
Procedure
supplemental oxygen therapy
NCT01807897_exc_T42
Scope
continuous or bi-level positive airway pressure or adaptive servo-ventilation