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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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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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Aortic Regurgitation IV: Nursing Management01:17

Aortic Regurgitation IV: Nursing Management

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A nurse managing a patient with aortic regurgitation begins with a comprehensive assessment, including a review of the patient's medical history, family history, and lifestyle factors. During the cardiac examination, the nurse listens for heart sounds and checks for signs of valve abnormalities. The nurse also observes for symptoms such as dyspnea, orthopnea, and paroxysmal nocturnal dyspnea and assesses the patient's endurance and daily activity tolerance.Based on the findings, the nurse...
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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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The Aorta01:14

The Aorta

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The aorta is the largest artery in the human body. It originates from the left ventricle of the heart and extends down to the abdomen, where it splits into two smaller arteries. Structurally, it can be divided into four main parts: the ascending aorta, the aortic arch, the thoracic aorta, and the abdominal aorta.
The average diameter of the aorta is approximately 2-3 cm, but the size can vary depending on the section of the aorta and the individual's age, sex, and body size. The aorta is...
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The Arch of Aorta01:10

The Arch of Aorta

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The coronary arteries, originating from the ascending aorta, bifurcate from two sinuses located within the ascending aorta. Positioned just above the aortic semilunar valve, these sinuses house essential aortic baroreceptors and chemoreceptors, crucial for maintaining cardiac function. The left coronary artery and the right coronary artery branch off from the left posterior and anterior aortic sinuses, respectively.
Encircling the heart, the coronary arteries form a ring-like structure before...
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Related Experiment Video

Updated: Jan 21, 2026

Full-root Aortic Valve Replacement by Stentless Aortic Xenografts in Patients with Small Aortic Roots
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Aortic root and ascending aorta dimensions in acute aortic dissection.

Luca Koechlin1, Evelina Macius1, Josefin Kaufmann1

  • 1Department of Cardiac Surgery, University Hospital Basel, Basel, Switzerland.

Perfusion
|August 1, 2019
PubMed
Summary

Acute aortic dissection may occur with aortic diameters smaller than previously thought. Female gender, age, and medical history are associated with dissection risk, not just aortic size.

Keywords:
aortic rootascending aortatype A aortic dissection

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Area of Science:

  • Cardiovascular Medicine
  • Radiology
  • Genetics

Background:

  • Acute aortic dissection is a life-threatening condition.
  • Ascending aorta and aortic root dimensions are critical in assessing dissection risk.
  • Previous assumptions about aortic diameter expansion in dissection may need reevaluation.

Purpose of the Study:

  • To evaluate ascending aorta and aortic root dimensions in patients with acute type A dissection.
  • To identify demographic factors associated with acute aortic dissection.

Main Methods:

  • Analysis of 225 patients with ascending aorta and 223 patients with aortic root data from 2009-2017.
  • Aortic diameters assessed via preoperative computed tomography scans.
  • Predissection diameters modeled assuming 30% augmentation during the acute event.

Main Results:

  • Mean ascending aorta diameter at dissection was 46 ± 8 mm (modeled 32.3 ± 5.7 mm).
  • Mean aortic root diameter at dissection was 42 ± 8 mm (modeled 29.5 ± 5.6 mm).
  • Female gender and history of cerebrovascular event linked to small aortic root dissection; patient age and inguinal hernia history linked to ascending aorta dissection.

Conclusions:

  • Over 90% of patients had aortic root and ascending aorta diameters <45 mm.
  • Aortic diameter expansion over 55 mm in acute aortic dissection appears overestimated.
  • Factors beyond aortic size are crucial for identifying high-risk patients.