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Related Concept Videos

Acute Respiratory Failure-II01:21

Acute Respiratory Failure-II

319
Type I Respiratory Failure, or hypoxemic respiratory failure, occurs when the partial pressure of oxygen (PaO2) in arterial blood falls below 60 mmHg while breathing room air without a corresponding increase in arterial carbon dioxide levels (PaCO2). This condition highlights a significant impairment in the lungs' capacity to oxygenate the blood.
The underlying physiological abnormalities that contribute to hypoxemic respiratory failure include:
319
Aortic Regurgitation III: Medical Management01:25

Aortic Regurgitation III: Medical Management

32
Aortic regurgitation (AR) is when the aortic valve does not close or seal properly, leading to backward blood circulation from the aorta into the left ventricle during diastole. Common causes of AR include rheumatic heart disease, congenital valve defects, and aortic root dilation. Managing AR requires a multifaceted approach to alleviate symptoms, preserve left ventricular function, and address the underlying cause of the regurgitation. Patients with symptomatic AR or significant left...
32
Aortic Regurgitation II: Clinical Features and Diagnostic Tests01:22

Aortic Regurgitation II: Clinical Features and Diagnostic Tests

46
Aortic valve regurgitation (AR) occurs when the aortic valve fails to close properly, allowing blood to flow backward from the aorta into the left ventricle. This backflow can result in two distinct clinical presentations: acute and chronic AR, each characterized by its own set of symptoms and physical findings.Acute Aortic RegurgitationAcute AR presents with a sudden onset of severe symptoms. Patients typically experience profound dyspnea (shortness of breath), chest pain, and signs of left...
46
Heart Failure II: Pathophysiology01:29

Heart Failure II: Pathophysiology

31
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...
31
Cardiomyopathy IV: Restrictive Cardiomyopathy01:29

Cardiomyopathy IV: Restrictive Cardiomyopathy

20
Restrictive cardiomyopathy (RCM) is a rare heart muscle disease characterized by impaired ventricular filling due to stiffened ventricular walls, leading to significant diastolic dysfunction.EtiologyRestrictive cardiomyopathy can arise from both inherited and acquired diseases, many of which are systemic. It is categorized into four main types: infiltrative, storage, non-infiltrative, and endomyocardial diseases.Infiltrative diseases, such as amyloidosis, lead to RCM by depositing amyloid...
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Mitral Stenosis I: Introduction01:22

Mitral Stenosis I: Introduction

26
Mitral Valve Stenosis (MVS) is a heart condition where the mitral valve narrows, impeding blood circulation from the left atrium to the left ventricle. The etiology and pathophysiology of this condition are multifaceted, leading to a cascade of cardiovascular complications.Causes of Mitral Valve StenosisRheumatic Heart Disease: It is the main cause of mitral valve stenosis, particularly in developing nations. This condition arises from rheumatic fever, an inflammatory illness resulting from...
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Updated: Aug 23, 2025

Invasive Hemodynamic Monitoring of Aortic and Pulmonary Artery Hemodynamics in a Large Animal Model of ARDS
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Left Ventricular Diastolic Dysfunction in ARDS Patients.

Paolo Formenti1, Silvia Coppola1, Laura Massironi2

  • 1Department of Anesthesia and Intensive Care, ASST Santi Paolo e Carlo, San Paolo University Hospital, 20142 Milan, Italy.

Journal of Clinical Medicine
|October 27, 2022
PubMed
Summary
This summary is machine-generated.

Diastolic dysfunction in mechanically ventilated Acute Respiratory Distress Syndrome (ARDS) patients was linked to increased lung edema. However, it did not impact respiratory mechanics, gas exchange, or lung recruitability.

Keywords:
ARDSleft ventricular diastolic dysfunctiontotal lung weight

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Area of Science:

  • Cardiology
  • Pulmonology
  • Critical Care Medicine

Background:

  • Acute Respiratory Distress Syndrome (ARDS) is a critical condition requiring mechanical ventilation.
  • Diastolic dysfunction, a heart condition, may influence ARDS outcomes.
  • Understanding this relationship is crucial for optimizing patient management.

Purpose of the Study:

  • To investigate the presence of diastolic dysfunction in mechanically ventilated ARDS patients.
  • To evaluate the effects of diastolic dysfunction on respiratory mechanics, gas exchange, and lung recruitability.
  • To determine if diastolic dysfunction influences the response to positive end-expiratory pressure (PEEP) titration.

Main Methods:

  • Echocardiography was used to assess diastolic function in ARDS patients.
  • Lung CT scans were performed at varying positive end-expiratory pressure (PEEP) levels (5 and 45 cmH2O).
  • Patients underwent mechanical ventilation with randomly applied PEEP levels of 5 and 15 cmH2O.

Main Results:

  • 30% of ARDS patients exhibited diastolic dysfunction (grades 1-3).
  • Patients with diastolic dysfunction had significantly higher total lung weight, indicating more lung edema.
  • No significant differences were observed in gas exchange, respiratory mechanics, lung recruitability, or response to PEEP changes between groups.

Conclusions:

  • Left ventricular diastolic dysfunction is associated with increased lung edema in ARDS patients.
  • Diastolic dysfunction did not significantly alter respiratory mechanics or gas exchange in this cohort.
  • Further research is needed to fully elucidate the impact of diastolic dysfunction on ARDS prognosis.