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2018 The Author(s). Objectives: The aim of this study was to investigate the effect of age and sex on nPWV and ndI in the ascending aorta of healthy humans. Background: Local pulse wave velocity (nPWV) and wave intensity (ndI) in the human ascending aorta have not been studied adequately, due to the need for invasive pressure measurements. However, a recently developed technique made the non-invasive determination of nPWV and ndI possible using measurements of flow velocity and arterial diameter. Methods: Diameter and flow velocity were measured at the level of the ascending aorta in 144 healthy subjects (aged 20-77 years, 66 male), using magnetic resonance imaging. nPWV, ndI parameters; forward (FCW); backward (BCW) compression waves, forward decompression wave (FDW), local aortic distensibility (nDs) and reflection index (nRI) were calculated. Results: nPWV increased significantly with age from 4.7±0.3 m/s for those 20-30 years to 6.4±0.2 m/s for those 70-80 years (P |
