Clinical trial NCT00701038: Diagnosis and Treatment of Sleep Apnea in the Acute Exacerbation of Heart Failure
Official title: The Role of Diagnosis and Treatment of Sleep Apnea in the Acute Exacerbation of Heart Failure
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: NA
Conditions: Sleep Apnea
Heart Failure
Keywords: Sleep apnea,
obstructive sleep apnea,
heart failure,
CHF
Lead sponsor: Ohio State University
Sponsor class: OTHER
First posted: 2008-06-19
Enrollment: 54
Sex: ALL
Minimum age (years): 21
Maximum age (years): 80
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Allocation: RANDOMIZED
Intervention model: PARALLEL
Primary purpose: TREATMENT

Brief summary: Congestive heart failure affects 2.3 percent of the population (approximately 4,900,000) with an incidence of 10 per 1,000 of the population after the age of 65 (1). The admission rate for patients with heart failure is on the rise, so is the mortality associated with it and its national annual bill, now exceeding $21 billion (1). Obstructive Sleep Apnea (OSA) is present in 11-37 percent of patients with heart failure (2,3), and tends to increase in severity when the heart failure is less controlled (4, 5). Therefore, the actual prevalence of OSA in patients hospitalized with acute heart failure is likely higher. There is now evidence that treatment of OSA with nasal Continuous Positive Pressure (nCPAP) in outpatients with stable heart failure improves left ventricular ejection fraction, and quality of life (6), and confers a reduction in fatal and non-fatal cardiovascular events (7). However, there has not been any evaluation of the role of diagnosis and treatment of OSA in patients hospitalized with acute heart failure. This uncertainty about the true prevalence and role of OSA in exacerbations of heart failure, and the role of its treatment in the acute setting may explain why aggressive diagnostic and therapeutic strategy for OSA in patients admitted to the hospital with acute heart failure is not part of the standard clinical practice in acute care centers. Given the rising admission rate, and mortality associated with heart failure, an evaluation of the role of OSA and its treatment in this patient population is highly significant.

Detailed description: OSA is associated with large negative swings in the intrathoracic pressure, significant increase in the sympathetic nerve activity and repetitive surges in blood pressure, along with episodic hypoxia and hypercapnea (8, 9). These autonomic and respiratory changes may increase the cardiac muscle workload, cardiac dysrrhythmia, and exacerbate ischemia (10,11,12). Treatment with continuous positive airway pressure (CPAP) is the most successful therapeutic modality available for obstructive sleep apnea. It is still not clear whether establishing the diagnosis of OSA and initiating treatment with CPAP while still in the hospital carries any benefit in the management of patients with acute heart failure. This study will evaluate the effect of work up and treatment of OSA on the outcome of patients hospitalized with acute congestive heart failure (CHF).

Eligibility criteria: .Inclusion Criteria:

* Able to provide an informed consent
* Speaks English
* Older than 21
* Heart Failure
* Positive for OSA

Exclusion Criteria:

* CSA
* Already on CPAP
* Hemodynamic instability
* Acute respiratory failure
* Neurological defect
* Dialysis

Primary outcomes:
measure: Left Ventricular Ejection Fraction Improvement
timeFrame: baseline and again after three nights in hospital
Secondary outcomes:
Other outcomes:
Locations:
Study officials:
affiliation: Ohio State University
name: Rami N Khayat, MD
role: PRINCIPAL_INVESTIGATOR
References:
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citation: Roebuck T, Solin P, Kaye DM, Bergin P, Bailey M, Naughton MT. Increased long-term mortality in heart failure due to sleep apnoea is not yet proven. Eur Respir J. 2004 May;23(5):735-40. doi: 10.1183/09031936.04.00060404.
citation: Khayat RN, Abraham WT, Patt B, Pu M, Jarjoura D. In-hospital treatment of obstructive sleep apnea during decompensation of heart failure. Chest. 2009 Oct;136(4):991-997. doi: 10.1378/chest.09-0597. Epub 2009 Jun 30.