[Radial augmentation index is associated with cardiovascular risk and arterial stiffness]
Wen-kai Xiao1, Ping Ye, Lei-ming Luo
1Second Department of Cardiology, PLA General Hospital, Beijing, China. xiaowk301@sina.com
Insights
Radial augmentation index (AI) may indicate cardiovascular risk and arterial stiffness. This marker is more effective for differentiating risk in younger individuals compared to older ones.
Area of Science:
- Cardiovascular physiology
- Vascular biomechanics
- Biomarker research
Context:
- Arterial stiffness and cardiovascular risk are critical health concerns.
- Augmentation index (AI) is a non-invasive measure of arterial function.
- Existing research on AI's association with cardiovascular risk and arterial stiffness requires further investigation.
Purpose:
- To determine if radial augmentation index (rAI) correlates with cardiovascular risk scores and arterial stiffness measures.
- To explore the relationship between rAI, cardiovascular risk, and pulse wave velocity (PWV) in a large cohort.
- To assess the influence of age on the association between rAI and cardiovascular parameters.
Summary:
- A study of 4985 adults found radial augmentation index (rAI) was higher in women than men.
- rAI showed significant correlations with cardiovascular risk scores and carotid-femoral PWV (CFPWV), particularly in men and younger individuals.
- The association between rAI and arterial stiffness (CFPWV) was significant, but not with carotid-radial PWV (CRPWV).
Impact:
- Radial AI may serve as a valuable, accessible marker for assessing cardiovascular risk and arterial stiffness.
- The findings suggest rAI could be a practical tool for risk stratification, especially in younger populations.
- This research contributes to understanding AI's role in cardiovascular health assessment and disease prevention.
Objective:
To investigate whether radial augmentation index (AI) associates with cardiovascular risk as well as arterial stiffness.
Methods:
A total of 4985 subjects, 2417 men and 2568 women, aged 18 - 96 (50.9 ± 14.7) years, were recruited. AI was measured in the left radial artery using tonometry Colin HEM-9000AI. Carotid-femoral PWV (CFPWV) and carotid-radial PWV (CRPWV) were examined by automatic pulse wave velocity (PWV) measuring system. Framingham risk score and Chinese ischemic cardiovascular disease risk score were applied upon subjects without cardiovascular disease to calculate individual cardiovascular risk respectively.
Results:
Radial AI (rAI) was significantly higher in women than in men[ (83.18 ± 12.36)% vs (71.93 ± 15.22)%, P < 0.01]. Simple correlation analysis showed rAI was significantly correlated to two cardiovascular risk scores or CFPWV and CRPWV. After adjusted for multi-factors, rAI was still significantly correlated to Framingham risk score or Chinese ischemic cardiovascular disease risk score (r = 0.17 and 0.12) in men respectively (P < 0.05), while r were 0.09 and 0.08 in women respectively (P < 0.05). In multivariate analysis, there was a significant association between CFPWV and rAI (r = 0.14 in men, r = 0.10 in women, P < 0.01), whereas the relation ship between CRPWV and rAI was not found. The relationship between rAI and cardiovascular risk or PWV became weaker for those aged above 50 years.
Conclusion:
Augmentation index might be a useful marker of cardiovascular risk and arterial stiffness, which could be more feasible for younger subjects as a tool for risk differentiation.
Related Concept Videos
Assessment of radial pulse
The radial pulse, located at the wrist, is often the preferred site for assessing peripheral pulse because of its accessibility and dependability. The process of determining the radial pulse involves several steps:
Assessment of apical radial pulse
The A-R pulse assessment involves simultaneous evaluation of the apical and radial pulses. When the apical and radial pulse rates vary, this assessment helps identify a pulse deficit.
Pre-Procedural Preparation
Coronary Artery Disease I: Introduction
Peripheral Arterial Disease II: Clinical Manifestations and Diagnostic Evaluation
Atherosclerosis II: Clinical Manifestations and Diagnostic Tests
Rheumatic Heart Disease II: Clinical Manifestations and Diagnostic Studies

