Cited by 287Aortic Disease and Treatment ApproachesAortic aneurysm repair treatmentsConnective tissue disorders research

Height alone, rather than body surface area, suffices for risk estimation in ascending aortic aneurysm

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Zafar, Mohammad A., Li, Yupeng, Rizzo, John A., Charilaou, Paris, Saeyeldin, Ayman, Velasquez, Camilo A., Mansour, Ahmed M., Bin Mahmood, Syed Usman +11 more·2018·The Journal of Thoracic and Cardiovascular Surgery

Abstract

Background In international guidelines, risk estimation for thoracic ascending aortic aneurysm (TAAA) is based on aortic diameter. We previously introduced the aortic size index (ASI), defined as aortic size/body surface area (BSA), as a predictor of aortic dissection, rupture, and death. However, weight might not contribute substantially to aortic size and growth. We seek to evaluate the height-based aortic height index (AHI) versus ASI for risk estimation and revisit our natural history calculations.Methods Aortic diameters and long-term complications of 780 patients with TAAA were analyzed. Growth rate estimates, yearly complication rates, and survival were assessed. Risk stratification was performed using regression models. The predictive value of AHI and ASI was compared.Results Patients were stratified into 4 categories of yearly risk of complications based on their ASI and AHI. ASIs (cm/m 2) of ≤2.05, 2.08 to 2.95, 3.00 to 3.95 and ≥4, and AHIs (cm/m) of ≤2.43, 2.44 to 3.17, 3.21 to 4.06, and ≥4.1 were associated with a 4%, 7%, 12%, and 18% average yearly risk of complications, respectively. Five-year complication-free survival was progressively worse with increasing ASI and AHI. Both ASI and AHI were shown to be significant predictors of complications (P < .05). AHI categories 3.05 to 3.69, 3.70 to 4.34, and ≥4.35 cm/m were associated with a significantly increased risk of complications (P < .05). The overall fit of the model using AHI was modestly superior according to the concordance statistic.Conclusions Compared with indices including weight, the simpler height-based ratio (excluding weight and BSA calculations) yields satisfactory results for evaluating the risk of natural complications in patients with TAAA.

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Crossref · 10.1016/j.jtcvs.2017.10.140

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  • The most frequently used indexing methods are the Z-score, the aortic height index (AHI), and the aortic size index (ASI).

    “The most frequently used indexing methods are the Z-score (Z, dimensionless unit indicating the number of standard deviations from the population mean), the aortic height index (AHI, aortic diameter in millimeters divided by body length in meters), and the aortic size index (ASI, aortic diameter in centimeters divided by body surface area (BSA) per square meters) (Table 12).232,233,441-443”

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Authors
Zafar, M. A., Li, Y., Rizzo, J. A., Charilaou, P., Saeyeldin, A., Velasquez, C. A., Mansour, A. M., Bin Mahmood, S. U., Ma, W.-G., Brownstein, A. J., Tranquilli, M., Dumfarth, J., Theodoropoulos, P., Thombre, K., Tanweer, M., Erben, Y., Peterss, S., Ziganshin, B. A., & Elefteriades, J. A.
Affiliations
  • Yale New Haven Hospital (US)
  • Rowan University (US)
  • Stony Brook University (US)
  • Yale University (US)
  • Ludwig-Maximilians-Universität München (DE)
Corresponding author
Elefteriades, John A.
Venue
The Journal of Thoracic and Cardiovascular Surgery
Publisher
Elsevier BV
Published
2018-05
Volume
155
Issue
5
Pages
1938-1950
ISSN
0022-5223 (ISSN-L)
OpenAlex
W2773369012
Cited by
287
References
28
Citations by year
2026: 42 · 2025: 42 · 2024: 35 · 2023: 38 · 2022: 38 · 2021: 36 · 2020: 24 · 2019: 17 · 2018: 11 · 2017: 3
FWCI
12.44
Type
journal article
Language
en
Open access
Locations
  • Journal of Thoracic and Cardiovascular Surgery (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Aortic Disease and Treatment Approaches
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Aortic aneurysm repair treatments
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Connective tissue disorders research
Keywords
aortic size index, body surface area, risk stratification, aortic diameter, aortic dissection, aneurysm rupture, natural history (disease), aneurysm growth rate, complication-free survival
MeSH terms
Progression-Free Survival, Adolescent, Adult, Aged, Aged, 80 and over, Body Height, Body Surface Area, Decision Support Techniques, Female, Humans, Male, Middle Aged, Predictive Value of Tests, Retrospective Studies, Risk Factors, Time Factors, Databases, Factual, Aortic Aneurysm, Thoracic, Disease Progression, Risk Assessment, Young Adult

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