Abstract P238: Distribution of Aortic Plaque by Sex and Age Among Community-dwelling Adults: A Framingham Magnetic Resonance Study
Introduction: Aortic plaque can be seen on noncontrast cardiovascular magnetic resonance (CMR) imaging. We sought to determine the prevalence, distribution and burden, or quantitative amount, of CMR-detected thoracic (TAP) and abdominal (AAP) aortic plaque in a community-dwelling cohort of adults.
Methods: 1794 Framingham Offspring cohort members underwent ECG-gated, fat-suppressed, T2-weighted TSE black blood aortic CMR at 1.5T: 1.03 x 0.64-mm pixels, 5-mm slice thickness. We obtained 12 thoracic (above diaphragm, 1-cm interslice gap) slices and 24 abdominal (below diaphragm/above aortic bifurcation, 5-mm gap) slices. Plaque protruding ≥1mm into the lumen was traced on each slice and summed to determine AAP and TAP burdens. Participants were stratified by sex and 10-year age groups. We tabulated number of persons with prevalent (i.e. >0) AAP and TAP and tested for trend (Cochrane-Armitage) across age groups. Among those with plaque>0, we determined upper 90th percentile (P90) plaque burden, if the sex/age-group had ≥20 persons with prevalent plaque (we felt calculations based on N<20 would be speculative at best).
Results: Complete aortic studies were available on 1726 adults aged 65±9y (47% men). AAP was more prevalent than TAP: 359/806 (44.5%) men and 430/920 (46.7%) women had AAP, p=0.26; 72/806 (8.9%) men and 65/920 (7.1%) women had TAP, p=0.15. The Table shows sex-specific distributions and burdens of plaque by age-group, where +AAP (+TAP) indicates abdominal (thoracic) aortic plaque is present. Prevalence of both AAP and TAP increased monotonically with age (p<0.0001) in both sexes. Burden of AAP at the P90 level also increased monotonically with age.
Conclusions: Among middle-aged and older community dwelling adults, AAP is seen on noncontrast CMR in 45.7%, while TAP is less prevalent at 7.9%. Prevalence of aortic plaque did not differ between men and women and increases with age in both sexes. Burden (amount) of AAP also increases with greater age.
Author Disclosures: S. Qazi: None. P.N. Gona: None. N. Oyama-Manabe: None. C.J. Salton: None. C.J. O’Donnell: None. W.J. Manning: None. M.L. Chuang: None.
- © 2016 by American Heart Association, Inc.