High aortic augmentation index predicts mortality and cardiovascular events in men from a general population, but not in women.
BACKGROUND
A recent meta-analysis concluded that augmentation index (AIx), a measure of pulse wave reflections influencing the central blood pressure, is related to mortality and cardiovascular disease (CVD) events and is likely to be clinically useful. However, prospective data based on non high-risk populations and women are lacking.


RESULTS
In a random sample comprising 1300 men and 1773 women from Copenhagen, Denmark, AIx was measured non-invasively by use of the SphygmoCor device. The population was followed prospectively for a mean of 6.5 years for all-cause mortality and a combined CVD end point (time to first myocardial infarction, ischaemic cerebrovascular disease, percutaneous coronary intervention, coronary by-pass graft, or death from any cause). In men, hazard ratio (HR) in highest AIx tertile vs. lowest was 1.68 (95% CI 1.02-2.76) for all-cause mortality and 1.60 (95% CI 1.07-2.39) for the combined CVD end point after multivariable adjustment for CVD risk factors. In women, however, AIx was not related to either outcome with adjusted HR of 0.70 (95% CI 0.46-1.05) for all-cause mortality and 1.12 (95% CI 0.78-1.58) for the combined CVD end point.


CONCLUSIONS
Our findings support that AIx relates to CVD in men but question the value in women. This gender differences may relate to different development in AIx with increasing age in men and women. Further studies are needed before AIx can be considered in CVD risk stratification or clinical practice.
Hvidovre University Hospital, Hvidovre, Denmark.
Julie Hjortsø
JH
Janner
Nina Skavlan
NS
Godtfredsen
Steen
S
Ladelund
Jørgen
J
Vestbo
Eva
E
Prescott
D000328:Adult; D000368:Aged; D001794:Blood Pressure; D002318:Cardiovascular Diseases / Q000175:diagnosis / Q000401:mortality* / Q000503:physiopathology* / Q000628:therapy; D016009:Chi-Square Distribution; D001026:Coronary Artery Bypass; D003718:Denmark / Q000453:epidemiology; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D015999:Multivariate Analysis; D062645:Percutaneous Coronary Intervention; D011237:Predictive Value of Tests; D011379:Prognosis; D016016:Proportional Hazards Models; D011446:Prospective Studies; D063177:Pulse Wave Analysis; D012307:Risk Factors; D012737:Sex Factors; D013997:Time Factors; D059289:Vascular Stiffness