Related Experiment Video

Updated: Sep 19, 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

503

Ascending aortic aneurysm and dissection risk: focus on aortic height index

Susanna Grego1, Alberto Pozzoli2, Tiziano Torre2

  • 1Rare Cardiovascular Disease Unit, Cardiocentro Ticino Institute, EOC, Lugano, Switzerland.

Interdisciplinary Cardiovascular and Thoracic Surgery
|June 2, 2025
PubMed

Insights

The aortic diameter to height index (AHI) identifies moderate risk in acute aortic dissection patients. Patients with AHI over 2.9 cm/m require specialized assessment, regardless of absolute aortic size.

Area of Science:

  • Cardiovascular Surgery
  • Thoracic Surgery
  • Vascular Surgery

Background:

  • Acute aortic dissection (AAD) often occurs with ascending aorta dilation below surgical thresholds.
  • The aortic diameter to height index (AHI) is a proposed tool for risk stratification in AAD.
  • Accurate risk assessment is crucial for timely prophylactic surgery in patients with aortic dilation.

Purpose of the Study:

  • To evaluate the utility of AHI in risk stratification for patients with AAD.
  • To determine if AHI can improve the identification of patients requiring intervention.
  • To compare AHI in AAD patients versus a control group without aortic pathology.

Main Methods:

  • Retrospective analysis of prospectively collected data from 210 AAD patients operated on between 2001 and 2023.
  • Calculation of AHI for all AAD patients and a control group (n=6343).
  • Risk modeling analysis and simulation of the dissecting process based on AHI.

Main Results:

  • 80% of AAD patients had post-junctional aortic dilation; 25% had aortic diameter > 5.5 cm.
  • AHI categorized patients into low (9%), moderate (67.6%), high (21.3%), and severe (2%) risk.
  • Peak AHI for dissection was 2.93 cm/m (males) and 3.05 cm/m (females). Control group AHI was 2.01 cm/m.
  • Simulations indicated 3.3% of patients had AHI ≥ 2.9 cm/m.

Conclusions:

  • AHI revealed a significant prevalence of moderate risk in AAD patients.
  • Patients with AHI exceeding 2.9 cm/m warrant referral to an aortic center for risk assessment.
  • AHI provides valuable risk stratification for acute aortic dissection, independent of absolute aortic diameter.
Abstract

Keywords:
acute aortic dissection riskaortic diameter/height indexascending aorta aneurysmprevention

More Related Videos

Author Spotlight: Using Point-of-Care Ultrasound for Comprehensive Evaluation of the Abdominal Aorta07:12

Author Spotlight: Using Point-of-Care Ultrasound for Comprehensive Evaluation of the Abdominal Aorta

Published on: September 8, 2023

3.0K
Modified Octopus Technique for Thoracoabdominal Aortic Aneurysm04:56

Modified Octopus Technique for Thoracoabdominal Aortic Aneurysm

Published on: August 1, 2025

123

Related Concept Videos

Aneurysm I: Introduction01:30

Aneurysm I: Introduction

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...
31
Aneurysm II: Clinical Manifestations and Diagnostic Studies01:21

Aneurysm II: Clinical Manifestations and Diagnostic Studies

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...
27
Aneurysm III: Interprofessional Care01:26

Aneurysm III: Interprofessional Care

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...
30
Aortic Regurgitation I: Introduction01:15

Aortic Regurgitation I: Introduction

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...
46
Aortic Regurgitation III: Medical Management01:25

Aortic Regurgitation III: Medical Management

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...
53
Aortic Regurgitation II: Clinical Features and Diagnostic Tests01:22

Aortic Regurgitation II: Clinical Features and Diagnostic Tests

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...
60