The New England Journal of Medicine
e-mail icon  FREE NEJM E-TOC    HOME   |   SUBSCRIBE   |   CURRENT ISSUE   |   PAST ISSUES   |   COLLECTIONS   |    Advanced Search
Sign in | Get NEJM's E-Mail Table of Contents — Free | Subscribe
 
Original Article
PreviousPrevious
Volume 341:949-954 September 23, 1999 Number 13
NextNext

A Mechanism of Central Sleep Apnea in Patients with Heart Failure
Shahrokh Javaheri, M.D.

 Sign up for free e-toc
 

This Article
-Full Text
- PDF

Commentary
-Editorial
 by Cherniack, N. S.
-Letters

Tools and Services
-Add to Personal Archive
-Add to Citation Manager
-Notify a Friend
-E-mail When Cited

More Information
-PubMed Citation
ABSTRACT

Background Breathing is controlled by a negative-feedback system in which an increase in the partial pressure of arterial carbon dioxide stimulates breathing and a decrease inhibits it. Although enhanced sensitivity to carbon dioxide helps maintain the partial pressure of arterial carbon dioxide within a narrow range during waking hours, in some persons a large hyperventilatory response during sleep may lower the value below the apneic threshold, thereby resulting in central apnea. I tested the hypothesis that enhanced sensitivity to carbon dioxide contributes to the development of central sleep apnea in some patients with heart failure.

Methods This prospective study included 20 men who had treated, stable heart failure with left ventricular systolic dysfunction. Ten had central sleep apnea, and 10 did not. The patients underwent polysomnography and studies of their ventilatory response to carbon dioxide.

Results Patients who met the criteria for central sleep apnea had significantly more episodes of central apnea per hour than those without central sleep apnea (mean [±SD], 35±24 vs. 0.5±1.0 episodes per hour). Those with sleep apnea also had a significantly larger ventilatory response to carbon dioxide than those without central sleep apnea (5.1±3.1 vs. 2.1± 1.0 liters per minute per millimeter of mercury, P=0.007), and there was a significant positive correlation between ventilatory response and the number of episodes of apnea and hypopnea per hour during sleep (r=0.6, P=0.01).

Conclusions Enhanced sensitivity to carbon dioxide may predispose some patients with heart failure to the development of central sleep apnea.


Source Information

From the Pulmonary Service, Veterans Affairs Medical Center, and the Department of Medicine, University of Cincinnati College of Medicine — both in Cincinnati.

Address reprint requests to Dr. Javaheri at the Pulmonary Section (111F), VA Medical Center, 3200 Vine St., Cincinnati, OH 45220, or at javaheri,shahrokh{at}cincinnati.va.gov.

Full Text of this Article


Related Letters:

Central Sleep Apnea and Heart Failure
Wilcox I., McNamara S. G., Sullivan C. E., Sin D. D., Man G. C., Jones R. L., Javaheri S.
Extract | Full Text  
N Engl J Med 2000; 342:293-294, Jan 27, 2000. Correspondence

This article has been cited by other articles:



HOME  |  SUBSCRIBE  |  SEARCH  |  CURRENT ISSUE  |  PAST ISSUES  |  COLLECTIONS  |  PRIVACY  |  HELP  |  beta.nejm.org

Comments and questions? Please contact us.

The New England Journal of Medicine is owned, published, and copyrighted © 2008 Massachusetts Medical Society. All rights reserved.