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Sleep Apnea01:21

Sleep Apnea

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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.
The condition is more prevalent among...
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Coronary Artery Disease (CAD) originates from a series of events that impair the function of coronary arteries, the blood vessels responsible for delivering oxygen-rich blood to the heart muscle. The pathophysiology of CAD is closely linked to atherosclerosis, a chronic inflammatory and lipid-driven condition affecting the vascular endothelium.1. Endothelial DamageThe process begins with damage to the vascular endothelium, which serves as a protective barrier between the blood and the vessel...
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Diagnosing acute coronary syndrome or ACS begins with a thorough patient history. Notable symptoms include central, crushing chest pain radiating to the left arm, neck, jaw, or back, along with shortness of breath, sweating (diaphoresis), nausea, vomiting, dizziness, and palpitations.It is crucial to note any history of cardiac illnesses and assess risk factors, including age, gender, smoking, hypertension, diabetes, hyperlipidemia, and a sedentary lifestyle.During physical examination, vital...
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Coronary Artery Disease (CAD) is a primary health risk worldwide, leading to significant morbidity and mortality. The condition arises from the buildup of atherosclerotic plaques within the coronary arteries, resulting in diminished blood supply to the heart muscle.The clinical manifestations of CAD vary widely, from asymptomatic stages to severe, life-threatening conditions. Understanding these manifestations is crucial for early diagnosis and effective management.Angina Pectoris: The Warning...
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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.
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Drug-Induced Sleep Endoscopy DISE with Target Controlled Infusion TCI and Bispectral Analysis in Obstructive Sleep Apnea
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Coronary endothelial function in patients with obstructive sleep apnea.

Andrew Cassar1, Timothy I Morgenthaler, Charanjit S Rihal

  • 1aDepartment of Internal Medicine, Division of Cardiovascular Diseases bDepartment of Internal Medicine, Division of Pulmonary and Critical Care cDepartment of Health Sciences Research, Division of Biomedical Statistics and Informatics dDepartment of Internal Medicine, Division of Nephrology and Hypertension, Mayo Clinic, Rochester, Minnesota, USA.

Coronary Artery Disease
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Obstructive sleep apnea (OSA) did not show a significant link to coronary endothelial dysfunction in patients with early coronary atherosclerosis. Cardiovascular outcomes in OSA patients may stem from factors other than endothelial dysfunction.

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Area of Science:

  • Cardiology
  • Sleep Medicine
  • Vascular Biology

Background:

  • Obstructive sleep apnea (OSA) is linked to cardiovascular disease, potentially via endothelial dysfunction.
  • The relationship between OSA and coronary endothelial dysfunction in nonobstructive atherosclerosis needs further investigation.

Purpose of the Study:

  • To assess the association between obstructive sleep apnea (OSA) and invasive coronary endothelial dysfunction.
  • To evaluate if OSA is an independent risk factor for endothelial dysfunction in patients with nonobstructive coronary atherosclerosis.

Main Methods:

  • Retrospective analysis of 143 patients undergoing polysomnography and coronary vasomotor studies.
  • Coronary endothelial function assessed via intracoronary acetylcholine testing.
  • Comparison of patients with OSA (n=102) and without OSA (n=41) using multivariate analysis and survival curves.

Main Results:

  • OSA patients had higher rates of hypertension but no significant association with coronary endothelial dysfunction.
  • No significant differences in endothelial function were observed based on OSA status or oxygen desaturation levels.
  • A trend towards higher mortality in OSA patients was noted but did not reach statistical significance.

Conclusions:

  • Obstructive sleep apnea (OSA) is not an independent risk factor for coronary endothelial dysfunction in early coronary atherosclerosis.
  • Adverse coronary outcomes in OSA patients may be independent of coronary endothelial dysfunction.