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Establishing reference values for aortic dimensions in the general Indian population and implications for global
Mohammed Idhrees1, Nora Bacour2, Onur Dolmaci3
1Institute of Cardiac and Aortic Disorders (ICAD), SRM Institutes for Medical Science (SIMS Hospital), Chennai, India.
Indian Journal of Thoracic and Cardiovascular Surgery
|April 13, 2026
Summary
Aortic dimensions in the Indian population are smaller than in Western populations, particularly in women. This finding suggests current surgical guidelines may need adjustment for Indian patients.
Area of Science:
- Cardiovascular Imaging and Radiology
- Thoracic Surgery
- Population Health Studies
Background:
- Aortic dimensions are critical for cardiovascular health and disease detection.
- Current surgical guidelines are based on Western population data.
- Limited data exists for the Indian population, hindering accurate diagnosis and management.
Purpose of the Study:
- To determine the general aortic size distribution in the Indian population.
- To provide population-specific data for improved cardiovascular care.
- To inform potential revisions of aortic surgical guidelines.
Main Methods:
- Computed tomography (CT) scans of 891 individuals (Jan-Dec 2022) were analyzed.
- Exclusion criteria included age <18, cardiovascular comorbidities, and aortic segments >45 mm.
- Maximum aortic diameters were measured at key anatomical levels.
Main Results:
- The mean ascending aorta diameter was 29.3 ± 3.9 mm, smaller in women (28.7 ± 4.0 mm) than men (29.8 ± 3.8 mm) after adjustments.
- 93.5% of subjects had an ascending aorta <3.5 cm.
- Ascending aorta diameters were significantly smaller in females across age, BMI, and BSA.
Conclusions:
- The Indian population exhibits smaller aortic dimensions, with most individuals <3.5 cm.
- Ascending aorta size is notably smaller in Indian women.
- Current surgical intervention thresholds (5-5.5 cm) may require re-evaluation for the Indian population, especially for females.
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