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Related Concept Videos

Aortic Regurgitation I: Introduction01:15

Aortic Regurgitation I: Introduction

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IntroductionAortic regurgitation is characterized by the backward flow of blood from the aorta into the left ventricle during diastole and arises from the improper closure of the aortic valve. This condition results in left ventricular volume overload and can stem from both acute and chronic etiologies, each contributing uniquely to the disease's progression and symptomatology.Acute and Chronic CausesAcute aortic regurgitation often results from events that suddenly impair the integrity of the...
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Aneurysm II: Clinical Manifestations and Diagnostic Studies01:21

Aneurysm II: Clinical Manifestations and Diagnostic Studies

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Thoracic, aortic arch and abdominal aneurysms are significant vascular conditions that can present with various clinical manifestations and lead to serious complications. Understanding these manifestations and the appropriate diagnostic studies is essential for effective management and treatment.Thoracic Aortic AneurysmsThoracic aortic aneurysms often remain asymptomatic until they reach a size that impinges on adjacent structures. They typically cause deep, diffuse chest pain that radiates to...
10
Aortic Regurgitation II: Clinical Features and Diagnostic Tests01:22

Aortic Regurgitation II: Clinical Features and Diagnostic Tests

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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...
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Aneurysm I: Introduction01:30

Aneurysm I: Introduction

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An aortic aneurysm is a localized outpouching or dilation at a weak point in the artery wall. It may involve different parts of the aorta, such as the abdominal aorta, aortic arch, or thoracic aorta.Etiological factorsSeveral disorders are associated with aortic aneurysms.Congenital causes, such as primary connective tissue disorders like Marfan syndrome, impact the integrity and strength of connective tissues, notably affecting the aorta. Marfan syndrome is a genetic disorder that specifically...
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Aortic Regurgitation III: Medical Management01:25

Aortic Regurgitation III: Medical Management

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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...
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Aneurysm III: Interprofessional Care01:26

Aneurysm III: Interprofessional Care

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Aneurysm management involves either conservative medical therapy or surgical intervention, depending on the size and symptoms of the aneurysm. Conservative management is generally reserved for smaller, asymptomatic aneurysms, while larger or symptomatic aneurysms often necessitate surgical repair.Conservative Medical TherapyFor small, asymptomatic aneurysms, particularly abdominal aortic aneurysms (AAA) less than 5.5 centimeters in diameter, conservative medical therapy is recommended. This...
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Related Experiment Video

Updated: Jul 24, 2025

Novel and Innovative Hybrid Technique for Type A Aortic Dissection
06:26

Novel and Innovative Hybrid Technique for Type A Aortic Dissection

Published on: March 28, 2025

391

Does the weekend effect exist for acute type A aortic dissection?-a retrospective case-control study.

Jinlin Wu1, Guang Tong1, Julia Fayanne Chen2

  • 1Department of Cardiac Surgery, Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China.

Journal of Thoracic Disease
|July 10, 2023
PubMed
Summary
This summary is machine-generated.

The weekend effect, a rise in mortality for weekend hospital admissions, does not appear to impact acute type A aortic dissection (ATAAD) outcomes. This study found no significant difference in mortality or complications for ATAAD patients treated on weekends versus weekdays.

Keywords:
Type A aortic dissectionmortalityweekend effect

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Area of Science:

  • Cardiovascular Surgery
  • Medical Outcomes Research
  • Health Services Research

Background:

  • The weekend effect describes a potential increase in mortality for patients admitted or operated on during weekends compared to weekdays.
  • Acute type A aortic dissection (ATAAD) is a life-threatening condition requiring timely surgical intervention.

Purpose of the Study:

  • To investigate the impact of the weekend effect on patient outcomes for acute type A aortic dissection (ATAAD).
  • To provide new evidence regarding potential disparities in care for ATAAD based on admission day.

Main Methods:

  • A comprehensive meta-analysis of existing literature on the weekend effect in ATAAD was performed.
  • A retrospective, case-control study using single-center data was conducted to analyze primary endpoints including operative mortality, stroke, paraplegia, and continuous renal replacement therapy (CRRT).
  • Propensity score matching (PSM) was utilized to control for confounding variables in the single-center cohort.

Main Results:

  • The meta-analysis of 18,462 individuals showed no significant increase in mortality for ATAAD patients admitted on weekends (OR: 1.16, 95% CI: 0.94-1.43).
  • The single-center cohort (479 patients) also revealed no significant differences in primary or secondary outcomes between weekend and weekday groups, even after adjusting for preoperative and operative factors (adjusted OR: 0.94, 95% CI: 0.41-2.02).
  • In the PSM cohort, operative mortality (7.2% weekend vs. 6.5% weekday) and overall survival were comparable between groups (P=1.000 and P=0.970, respectively).

Conclusions:

  • The weekend effect does not appear to be a significant factor influencing outcomes for acute type A aortic dissection.
  • While this specific condition may not be subject to the weekend effect, clinicians should remain aware that this phenomenon can be disease-specific and vary across different healthcare systems.