Consistency of aortic distensibility and pulse wave velocity estimates with respect to the Bramwell-Hill theoretical model: a cardiovascular magnetic resonance study

Journal of Cardiovascular Magnetic Resonance

Research

Anas Dogui¹  Muriel Lefort¹  Nadjia Kachenoura¹  Alain De Cesare¹  Alain Herment¹  Frédérique Frouin¹  Elie Mousseaux² 

[1] Inserm U678, 91 boulevard de l'Hôpital, 75634, Paris cedex 13, France;Inserm U678, 91 boulevard de l'Hôpital, 75634, Paris cedex 13, France;AP-HP, Service de Radiologie Cardiovasculaire, Hôpital Européen Georges Pompidou, 20 rue Leblanc, 75015, Paris, France;

关键词: Cardiovascular Magnetic Resonance;    Aortic Arch;    Arterial Stiffness;    Pulse Wave Velocity;    Aortic Stiffness;   

DOI  :  10.1186/1532-429X-13-11

 received in 2010-09-07, accepted in 2011-01-27,  发布年份 2011

来源: Springer

【 摘 要 】

BackgroundArterial stiffness is considered as an independent predictor of cardiovascular mortality, and is increasingly used in clinical practice. This study aimed at evaluating the consistency of the automated estimation of regional and local aortic stiffness indices from cardiovascular magnetic resonance (CMR) data.ResultsForty-six healthy subjects underwent carotid-femoral pulse wave velocity measurements (CF_PWV) by applanation tonometry and CMR with steady-state free-precession and phase contrast acquisitions at the level of the aortic arch. These data were used for the automated evaluation of the aortic arch pulse wave velocity (Arch_PWV), and the ascending aorta distensibility (AA_Distc, AA_Distb), which were estimated from ascending aorta strain (AA_Strain) combined with either carotid or brachial pulse pressure. The local ascending aorta pulse wave velocity AA_PWVc and AA_PWVb were estimated respectively from these carotid and brachial derived distensibility indices according to the Bramwell-Hill theoretical model, and were compared with the Arch_PWV. In addition, a reproducibility analysis of AA_PWV measurement and its comparison with the standard CF_PWV was performed. Characterization according to the Bramwell-Hill equation resulted in good correlations between Arch_PWV and both local distensibility indices AA_Distc (r = 0.71, p < 0.001) and AA_Distb (r = 0.60, p < 0.001); and between Arch_PWV and both theoretical local indices AA_PWVc (r = 0.78, p < 0.001) and AA_PWVb (r = 0.78, p < 0.001). Furthermore, the Arch_PWV was well related to CF_PWV (r = 0.69, p < 0.001) and its estimation was highly reproducible (inter-operator variability: 7.1%).ConclusionsThe present work confirmed the consistency and robustness of the regional index Arch_PWV and the local indices AA_Distc and AA_Distb according to the theoretical model, as well as to the well established measurement of CF_PWV, demonstrating the relevance of the regional and local CMR indices.

【 授权许可】

CC BY   
© Dogui et al; licensee BioMed Central Ltd. 2011