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CompletedNCT01741337Updated Feb 2, 2017

PAC-IC-SAS Pilot Study - Central Sleep Apneas Syndrome and Ventricular Function

An interventional study of Adaptive servo-ventilation post-operative treatment for 6 months in Central Sleep Apneas Syndrome, Heart Failure and Coronary Artery Bypass Graft Surgery or Other Coronary Reperfusion, sponsored by University Hospital, Grenoble. Completed at 1 site in France. Open to participants aged 18 Years to 90 Years. Per ClinicalTrials.gov, last updated 2017-02-02.

Sponsored by University Hospital, Grenoble · Not applicable, Interventional, and Treatment

Phase
Not applicable
Study type
Interventional
Enrollment
10
Allocation
Randomized
Ages
18 Years to 90 Years
Sex
All
01

Study summary

The aim of this clinical trial is to evaluate the effect of an early treatment of sleep-disordered breathing by adaptive servo-ventilation in heart failure patient following coronary artery bypass graft surgery or other coronary reperfusion.

Read the detailed description

This clinical trial is a pilot study, on patients with central sleep apneas syndrome and heart failure, undergoing coronary artery bypass graft surgery or other coronary reperfusion, and then randomized for the adaptive servo-ventilation treatment application or not after surgery.

The first objective is to evaluate the effect of an early treatment of sleep-disordered breathing by adaptive servo-ventilation in heart failure patient, in terms of ventricular recovery (ejection fraction improvement). This treatment will be instaurated just after coronary artery bypass graft surgery or other coronary reperfusion.

Secondary objectives :

  • Assessment of adaptive servo-ventilation effect on the endothelial function, the systemic inflammation and oxidative stress, the insulin resistance, after the surgery in comparison with non treated patient with heart failure and central sleep apneas.
  • Assessment of the impact of nocturnal desaturation level on the vascular reactivity and atherosclerosis of mammary vessels collected only during coronary artery bypass graft surgery.
  • Assessment of the impact of nocturnal desaturation level on the oxidative stress, inflammation and insulin sensitivity on abdominal and epicardiac adipose tissue collected during surgery.
02

Conditions studied

  • Central Sleep Apneas Syndrome
  • Heart Failure
  • Coronary Artery Bypass Graft Surgery or Other Coronary Reperfusion

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Keywords

  • central sleep apneas syndrome
  • heart failure
  • all coronary reperfusions
  • adaptive servo-ventilation treatment
03

In context

Heart Failure

5,803 studies on the registry are indexed under Heart Failure; 1,222 are open to participants now.

This study's enrollment of 10 is below the median of 72 across 3,790 interventional studies indexed under Heart Failure.

Browse Heart Failure studies →

Lead sponsor

University Hospital, Grenoble is the lead sponsor of 835 studies on the registry; 207 are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years to 90 Years
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Coronary artery bypass graft surgery or other coronary reperfusion
  • heart failure patient: with altered left ventricular ejection fraction by ultrasonography (45%\< LVEF ≤ 50% in 2D) or in 3D
  • Patient with central sleep apneas syndrome (SAS)

Exclusion criteria

Exclusion Criteria:

  • Aortic or mitral valvular surgery
  • Patient already treated for a central SAS
  • Patient with an obstructive SAS
  • Patient with malignant evolutive pathology
  • Pregnant or lactating women
05

Study design

Phase
Not applicable
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
None (open label)
Enrollment
10 participants (actual)

Study arms

  • Experimental
    Patients treated by ventilation

    Adaptive servo-ventilation post-operative treatment for 6 months

    Procedure: Adaptive servo-ventilation post-operative treatment for 6 months

  • No intervention
    Patients not treated by ventilation

    Patients not treated during 6 months by an adaptive servo-ventilation

Interventions

  • ProcedureAdaptive servo-ventilation post-operative treatment for 6 months

    Also known as: Adaptive servo-ventilation for sleep-disorderd breathing for 6 months

06

What researchers measure

Primary outcomes

  1. Percent of ventricular function recovery (left ventricular ejection fraction) improvement conferred by an adaptive servo-ventilation post-operative treatment

    Measurement of the left ventricular ejection fraction by a cardiac ultrasonography

    Time frame: after 6 months of adaptive servo-ventilation post-operative treatment

Secondary outcomes

  1. Assessment of adaptive servo-ventilation effect on the endothelial function, after the surgery in comparison with non treated patient with heart failure and central sleep apneas.

    Measurement of peripheral arterial tone

    Time frame: After 6 months of adaptive servo-sentilation post-operative treatment

  2. Assessment of the impact of nocturnal desaturation level on the vascular atherosclerosis of mammary vessels collected during coronary artery bypass surgery.

    By immunological and histological analysis of mammary vessels

    Time frame: sleep disordered breathing level, 2 months before surgery

  3. Assessment of the impact of nocturnal desaturation level on the oxidative stress, inflammation and insulin sensitivity of the abdominal and epicardiac adipose tissue collected during surgery.

    Measuring inflammatory and oxidative adipose markers

    Time frame: sleep disordered breathing level, 2 months before surgery

  4. Assessment of adaptive servo-ventilation effect on the systemic inflammation and oxidative stress, the insulin resistance, after the surgery in comparison with non treated patient with heart failure and central sleep apneas.

    Measurement of inflammatory and oxidative serum markers

    Time frame: After 6 months of adaptive servo-sentilation post-operative treatment

  5. Assessment of the impact of nocturnal desaturation level on the vascular reactivity of mammary vessels collected during surgery.

    By vascular reactivity study of mammary vessels

    Time frame: sleep disordered breathing level, 2 months before surgery

  6. Assessment of the impact of nocturnal desaturation level on the abdominal and epicardiac adipose tissue structure collected during surgery.

    By immunological and histological analysis of abdominal and epicardiac adipose tissue

    Time frame: sleep disordered breathing level, 2 months before surgery

07

Study locations

1 site
  • University Hospital of Grenoble
    Grenoble, 38000, France
08

References and documents

Publications

  • Vazir A, Hastings PC, Dayer M, McIntyre HF, Henein MY, Poole-Wilson PA, Cowie MR, Morrell MJ, Simonds AK. A high prevalence of sleep disordered breathing in men with mild symptomatic chronic heart failure due to left ventricular systolic dysfunction. Eur J Heart Fail. 2007 Mar;9(3):243-50. doi: 10.1016/j.ejheart.2006.08.001. Epub 2006 Oct 6. PubMed 17030014 ↗
09

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reachedSimilar studies: half by the dot; the band is the middle halfHalf of similar studies reached it by the dot; the band is the middle half, from a quarter to three quarters

Ran from Jan 2013 to primary completion in May 2015, 28 months.

Of 1,018 non-industry interventional studies with no phase under Heart Failure, half reached primary completion within 29 months of starting (the median), counting those still running; a quarter within 16 and three quarters within 50. This study's 28 months is close to that.

Counting every sponsor, half of 1,220 studies reached it within 31 months; a quarter within 16 and three quarters within 53.

How these figures are worked out, and which studies are left out of them.

Registered
Nov 23, 2012
First posted
Dec 4, 2012
StartActual
Jan 29, 2013
Primary completionActual
May 2015
CompletionActual
May 2015
Last update
Feb 2, 2017
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Feb 2, 2017, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT01741337
Responsible party
Sponsor
First posted
Dec 4, 2012
Start date
Jan 29, 2013
Primary completion
May 2015
Completion
May 2015
Last update
Feb 2, 2017

Study contacts

Renaud TAMISIER, MD, PhD
principal investigator · University Hospital of Grenoble, France

Oversight

Data monitoring committee
Yes
View the source record on ClinicalTrials.gov ↗

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This study is completed, as verified in Feb 2017. You cannot join it, but the record below documents what was studied.

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