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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.
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Systolic Heart Failure and Compensatory MechanismsSystolic heart failure (also termed HFrEF, Heart Failure with Reduced Ejection Fraction) is the most prevalent type of heart filure. It results in a decreased volume of blood being pumped from the ventricle. The aortic arch and carotid sinuses have baroreceptors that detect reduced blood pressure, triggering the sympathetic nervous system (SNS) to release epinephrine and norepinephrine. Initially, this response aims to boost heart rate and...
Insufficient Sleep and Sleep Deprivation01:13

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Insufficient sleep refers to not getting the recommended amount of sleep for optimal functioning, even if it's just slightly less than needed. Sleep insufficiency may occur due to lifestyle choices, such as staying up late for social events or work, resulting in routinely getting less sleep than required. For example, consistently sleeping 6 hours when the body needs 7-9 hours can lead to cumulative effects on health and well-being.
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Circadian rhythms are cyclic changes that are crucial in plasma drug concentrations. Various standard circadian parameters, including core body temperature, heart rate, and other cardiovascular factors, directly impact disease states and the therapeutic response to drug therapy.
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Assessing Blood pressure using a doppler ultrasound01:19

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To obtain accurate blood pressure measurements in clinical settings, especially when traditional methods are insufficient, healthcare professionals utilize the Doppler ultrasound technique. This method uses high-frequency sound waves to detect blood flow within the arteries, which is crucial for patients with conditions that complicate circulatory system assessment.
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Preparation of Equipment:

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Updated: May 20, 2026

Drug-Induced Sleep Endoscopy (DISE) with Target Controlled Infusion (TCI) and Bispectral Analysis in Obstructive Sleep Apnea
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Impact of obstructive sleep apnoea on diastolic function.

Rolf Wachter1, Lars Lüthje, Daniela Klemmstein

  • 1Dept of Cardiology and Pneumology, University of Göttingen, Göttingen, Germany.

The European Respiratory Journal
|July 14, 2012
PubMed
Summary

Obstructive sleep apnoea (OSA) is independently linked to diastolic dysfunction in individuals with cardiovascular risk factors. Moderate-to-severe OSA significantly increases the prevalence and degree of diastolic dysfunction.

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Area of Science:

  • Cardiology
  • Sleep Medicine
  • Internal Medicine

Background:

  • Diastolic dysfunction is a common complication in patients with cardiovascular risk factors.
  • Obstructive sleep apnoea (OSA) is a prevalent condition often coexisting with cardiovascular disease.
  • The independent impact of OSA on diastolic function requires further elucidation.

Purpose of the Study:

  • To investigate the independent association between obstructive sleep apnoea severity and diastolic dysfunction.
  • To assess the prevalence and degree of diastolic dysfunction across different levels of sleep apnoea severity.

Main Methods:

  • Prospective cohort study including 378 patients with cardiovascular risk factors.
  • Polygraphy was performed to assess sleep apnoea, classified by apnoea/hypopnoea index (AHI).
  • Diastolic function was evaluated using comprehensive echocardiography with tissue Doppler.

Main Results:

  • In 352 subjects (excluding central sleep apnoea and pre-diagnosed OSA), 21.6% had moderate-to-severe OSA (AHI ≥15).
  • Prevalence of diastolic dysfunction increased with OSA severity: 44.8% (none), 56.8% (mild), 69.7% (moderate-to-severe) (p=0.002).
  • Multivariate analysis identified age, BMI, AHI, and cardiac frequency as independent predictors of diastolic dysfunction.

Conclusions:

  • Moderate-to-severe obstructive sleep apnoea is an independent risk factor for diastolic dysfunction.
  • OSA contributes significantly to the development and severity of diastolic dysfunction in at-risk populations.
  • Early detection and management of OSA may be crucial for preventing cardiovascular complications.