Augmentation index and aortic stiffness in bicuspid aortic valve patients with non-dilated proximal aortas
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- 作者：Patrick J Warner (2)
Adeeb Al-Quthami (2)
Erica L Brooks (2)
Alyson Kelley-Hedgepeth (1) (2)
Eshan Patvardhan (2)
Jeffrey T Kuvin (2)
Kevin S Heffernan (2)
Gordon S Huggins (1) (2) - 关键词：Bicuspid aortic valve ; Arterial stiffness ; Augmentation index ; Pulse wave velocity
- 刊名：BMC Cardiovascular Disorders
- 出版年：2013
- 出版时间：December 2013
- 年：2013
- 卷：13
- 期：1
- 全文大小：168KB
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43. The pre-publication history for this paper can be accessed here:ttp://www.biomedcentral.com/1471-2261/13/19/prepub" class="a-plus-plus">http://www.biomedcentral.com/1471-2261/13/19/prepub - 作者单位：Patrick J Warner (2)
Adeeb Al-Quthami (2)
Erica L Brooks (2)
Alyson Kelley-Hedgepeth (1) (2)
Eshan Patvardhan (2)
Jeffrey T Kuvin (2)
Kevin S Heffernan (2)
Gordon S Huggins (1) (2)
2. Division of Cardiology and Vascular Function Study Group, Tufts Medical Center, Boston, MA, USA
1. MCRI Center for Translational Genomics, Molecular Cardiology Research Institute, Tufts Medical Center, Boston, MA, USA
文摘
Background We compared aortic stiffness, aortic impedance and pressure from wave reflections in the setting of bicuspid aortic valve (BAV) to the tricuspid aortic valve (TAV) in the absence of proximal aortic dilation. We hypothesized BAV is associated with abnormal arterial stiffness. Methods Ten BAV subjects (47 ± 4 years, 6 male) and 13 TAV subjects (46 ± 4 years, 10 male) without significant aortic valve disease were prospectively recruited. Characteristic impedance (Zc) was derived from echocardiographic images and pulse wave Doppler of the left ventricular outflow tract. Applanation tonometry was performed to obtain pulse wave velocity (PWV) at several sites as measures of arterial stiffness and augmentation index (AIx) as a measure of wave reflection. Results There were no significant differences between BAV and TAV subjects with regard to heart rate or blood pressure. Zc was similar between BAV and TAV subjects (p=0.25) as was carotid-femoral pulse wave velocity (cf-PWV) and carotid-radial PWV (cr-PWV) between BAV and TAV subjects (p=0.99). Carotid AIx was significantly higher in BAV patients compared with TAV patients (14.3 ± 4.18% versus -3.02 ± 3.96%, p=0.007). Conclusions Aortic stiffness and impedance is similar between subjects with BAV and TAV with normal aortic dimensions. The significantly higher carotid AIx in BAV, a proxy of increased pressure from wave reflections, may reflect abnormal vascular function distal to the aorta.