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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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Related Experiment Video

Updated: May 22, 2025

Morphological and Functional Assessment of the Right Ventricle Using 3D Echocardiography
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Right Atrial Function and Right Ventricular Diastolic Function and Their Relation With Exercise Capacity in OSAS.

Bang Du1, Shuxin Liang2, Rui Zhang1

  • 1Department of Echocardiography, The First Clinical Medical School of Gansu University of Chinese Medicine, Gansu Provincial Hospital, Lanzhou, China.

Echocardiography (Mount Kisco, N.Y.)
|March 16, 2025
PubMed
Summary

Obstructive sleep apnea syndrome (OSAS) is linked to impaired right atrial and right ventricular diastolic function, negatively impacting exercise capacity. Evaluating these functions is crucial for managing OSAS patients.

Keywords:
echocardiographyexercise capacityobstructive sleep apnea syndromeright atrial functionright ventricular function

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Area of Science:

  • Cardiology
  • Pulmonology
  • Sleep Medicine

Background:

  • Right ventricular (RV) and right atrial (RA) function are not well understood in obstructive sleep apnea syndrome (OSAS).
  • These cardiac functions may significantly affect exercise capacity in OSAS patients.

Purpose of the Study:

  • To assess RA and RV diastolic function in OSAS patients.
  • To investigate the relationship between these cardiac functions and exercise capacity.

Main Methods:

  • Echocardiography and cardiopulmonary exercise testing were performed on 53 OSAS patients and 30 controls.
  • Evaluated parameters included RV diastolic function, RA function, and exercise capacity (peak VO2).

Main Results:

  • Severe OSAS showed altered RV diastolic function (increased TV E/e', IVRT; reduced RV TDI e').
  • Impaired RA function (reduced emptying fractions, RA reservoir strain) was observed in severe OSAS.
  • RA reservoir strain correlated with peak oxygen uptake (VO2).

Conclusions:

  • Altered RA and RV diastolic function are associated with reduced exercise capacity in OSAS.
  • Assessing RA and RV diastolic function is important for managing patients with OSAS.