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Central aortic stiffness and its association with ascending aorta dilation in subjects with a bicuspid aortic valve

 Chi Young Shim  ;  In Jeong Cho  ;  Woo-In Yang  ;  Min-Kyung Kang  ;  Sungha Park  ;  Jong-Won Ha  ;  Yangsoo Jang  ;  Namsik Chung 
 Journal of the American Society of Echocardiography, Vol.24(8) : 847-852, 2011 
Journal Title
 Journal of the American Society of Echocardiography 
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BACKGROUND: Reduced elasticity and dilatation of the proximal aorta are highly prevalent in patients with bicuspid aortic valves (BAVs), even in the absence of valvular dysfunction. The aim of this study was to examine central aortic stiffness and its association with ascending aortic dilation in subjects with BAVs compared with controls. METHODS: Fifty subjects with BAVs (39 men; mean age, 52 ± 14 years) without significant valve dysfunction and 50 age-matched and gender-matched controls with normal trileaflet aortic valves were studied. Aortic diameter was measured using two-dimensional echocardiography, and central hemodynamics were assessed simultaneously using radial artery tonometry. Subjects with BAVs were divided into two groups on the basis of the median value of the aortic diameter. RESULTS: Subjects with BAVs had larger ascending aortic diameters (20.6 ± 4.0 vs 17.9 ± 2.4 mm/m(2), P < .001), higher augmentation indexes normalized for a heart rate of 75 beats/min (25.3 ± 9.7% vs 16.7 ± 8.6%, P < .001), higher pulse-wave velocities (7.8 ± 1.5 vs 7.2 ± 1.0 m/sec, P = .013), and lower pulse pressure amplification (1.24 ± 0.27 vs 1.35 ± 0.18, P = .022) than control subjects. The higher augmentation indexes were significant even in subjects with BAVs with relatively normal sized aortas. The diameter of the ascending aorta was correlated with augmentation index (r = 0.48, P < .001), pulse-wave velocity (r = 0.27, P = .063), and pulse pressure amplification (r = -0.46, P = .001) in subjects with BAVs. CONCLUSION: Subjects with BAVs had stiffer central hemodynamics than controls with tricuspid aortic valves, even in the absence of significant aortic dilation. Central aortic stiffness was positively correlated with the degree of aortic dilation in subjects with BAV. Thus, the evaluation of central aortic stiffness could be useful for the early detection and risk stratification of aortopathy in subjects with BAVs.
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1. Journal Papers (연구논문) > 1. College of Medicine (의과대학) > Dept. of Internal Medicine (내과학교실)
Yonsei Authors
강민경(Kang, Min Kyung)
박성하(Park, Sung Ha) ORCID logo https://orcid.org/0000-0001-5362-478X
심지영(Shim, Chi Young)
양우인(Yang, Woo In)
장양수(Jang, Yang Soo) ORCID logo https://orcid.org/0000-0002-2169-3112
정남식(Chung, Nam Sik)
조인정(Cho, In Jeong)
하종원(Ha, Jong Won) ORCID logo https://orcid.org/0000-0002-8260-2958
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