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Related Concept Videos

Sleep Apnea01:21

Sleep Apnea

Sleep apnea is a condition where breathing stops intermittently during sleep, often leading to significant health issues. Each episode can last from 10 to 20 seconds or more and is frequently accompanied by a brief arousal from sleep. This disturbance, largely unnoticed by the individual, can lead to severe daytime fatigue. Commonly, individuals seek help after being informed by their partners about loud snoring and noticeable breathing pauses during sleep.
The condition is more prevalent among...
Heart Failure VI: Adjunct Therapies01:22

Heart Failure VI: Adjunct Therapies

Additional therapies for treating patients with heart failure (HF) may include procedural interventions, supplemental oxygen, the management of sleep disorders, and nutritional therapy.Procedural InterventionsImplantable Cardioverter-Defibrillator: For patients at risk of life-threatening arrhythmias due to severe left ventricular dysfunction, an Implantable Cardioverter-Defibrillator (ICD) can detect and terminate these arrhythmias, preventing sudden cardiac death and improving survival rates.
Heart Failure III: Clinical Manifestations01:26

Heart Failure III: Clinical Manifestations

Heart failure (HF) manifests primarily as dyspnea, fatigue, and fluid retention, resulting in peripheral and pulmonary edema. Symptoms may vary depending on which ventricle is more affected, left or right.Left-Sided Heart FailureAlso known as left ventricular failure, this condition results from the left ventricle's inability to fill or eject sufficient blood into the systemic circulation. It leads to pulmonary congestion, which occurs when the left ventricle fails to eject blood effectively...
Imbalances in Cardiac Output01:26

Imbalances in Cardiac Output

The heart's primary function is to pump blood throughout the body, maintaining a balance between blood sent out (cardiac output) and blood returning (venous return). If this balance is disrupted, it can result in congestive heart failure (CHF), a severe condition where the heart becomes an inefficient pump, leading to inadequate blood circulation.
CHF can occur due to the failure of either side of the heart. Left-side failure leads to pulmonary congestion—the right side continues to send blood...
Heart Failure IV: Classification and Diagnostic Evaluation01:30

Heart Failure IV: Classification and Diagnostic Evaluation

Heart failure can be classified in various ways, with the most common classifications based on physical activity limitations, disease progression, severity, and treatment strategies.The Functional Classification of Heart Failure divides patients into four categories based on physical activity limitation due to symptom burden.Class I: Patients in this class have cardiac disease but no physical activity limitations. Ordinary activities like walking, climbing stairs, or routine tasks do not cause...
Pathophysiology of Heart Failure01:17

Pathophysiology of Heart Failure

Heart failure (HF) is a progressive syndrome involving ventricles that leads to inadequate cardiac output. It can be classified based on location and output or ejection fraction. Ejection fraction (EF) is an essential measurement in the diagnosis and surveillance of HF. Reduced EF corresponds to systolic heart failure (HFrEF). However, HF with preserved ejection fraction (HFpEF) is becoming increasingly prevalent. Also known as diastolic HF, this form of HF is related to aging. The...

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Related Experiment Video

Updated: Jun 3, 2026

Acupoint Application Combined with Ear Plaster Therapy for Treating Sleep Disorders with Acute Exacerbation of Chronic Obstructive Pulmonary Disease
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Complex sleep apnoea in congestive heart failure.

Thomas Bitter1, Nina Westerheide, Mohammed Sajid Hossain

  • 1Department of Cardiology, Heart and Diabetes Centre NRW, Ruhr University Bochum, Georgstrasse 11, D-32545 Bad Oeynhausen, Germany.

Thorax
|March 12, 2011
PubMed
Summary
This summary is machine-generated.

Complex sleep apnoea (complexSA) affects 18% of congestive heart failure patients with obstructive sleep apnoea (OSA). Adaptive servoventilation effectively treats complexSA and improves cardiac function and respiratory stability in these patients.

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Area of Science:

  • Cardiology
  • Pulmonology
  • Sleep Medicine

Background:

  • Sleep disordered breathing is common and prognostically significant in congestive heart failure (CHF) patients.
  • Complex sleep apnoea (complexSA) is defined as central sleep apnoea emerging during CPAP treatment for obstructive sleep apnoea (OSA).

Purpose of the Study:

  • To determine the prevalence and predictors of complexSA in CHF patients with OSA.
  • To assess the efficacy of adaptive servoventilation in treating complexSA and its effects on cardiac and respiratory parameters.

Main Methods:

  • 192 CHF patients with OSA underwent comprehensive assessments including echocardiography, cardiopulmonary exercise testing, and ventilatory response measurements before CPAP.
  • Patients developing complexSA during CPAP titration were treated with adaptive servoventilation, with follow-up assessments at 3-month intervals.

Main Results:

  • ComplexSA developed in 18% of patients during CPAP titration.
  • Higher respiratory controller gain (CO2 sensitivity) was independently associated with complexSA.
  • Adaptive servoventilation improved AHI, NYHA class, NT-proBNP, LVEF, ventilatory response, and exercise capacity.

Conclusions:

  • ComplexSA is highly prevalent in OSA patients with CHF and linked to higher baseline respiratory controller gain.
  • Adaptive servoventilation effectively manages complexSA and yields significant improvements in cardiac function and cardiorespiratory stability.