Related Experiment Videos
[Sleep-breathing disordered in stable chronic congestive heart failure]
1Division of Respiratory Disease, Renmin Hospital of Wuhan University, Wuhan 430060, China.
Zhonghua Nei Ke Za Zhi
|January 5, 2002
Summary
Sleep-disordered breathing is common in stable heart failure patients. This condition causes low oxygen levels and more arousals, potentially worsening heart function.
Area of Science:
- Cardiology
- Pulmonology
- Sleep Medicine
Context:
- Chronic heart failure (CHF) affects millions globally, with stable patients often experiencing comorbidities.
- Sleep-disordered breathing (SDB) is increasingly recognized as a significant factor in cardiovascular health.
Purpose:
- To investigate the prevalence and impact of SDB in patients with stable, optimally treated CHF.
- To correlate SDB severity with polysomnographic findings and left ventricular function.
Summary:
- Polysomnography was used to monitor patients with stable CHF, dividing them into groups based on apnea-hypopnea index (AHI).
- Patients with higher AHI (Group II) exhibited significantly more arousals, lower nocturnal oxyhemoglobin saturation, and reduced left ventricular ejection fraction compared to Group I.
- Cheyne-Stokes respiration with central sleep apnea was prevalent in Group II.
Impact:
- High prevalence of SDB, particularly central sleep apnea, in stable CHF patients.
- SDB is linked to nocturnal hypoxemia and increased arousals, negatively impacting cardiac function.
- Untreated SDB may exacerbate left ventricular dysfunction and increase mortality risk in CHF patients.