Circumferential strain by velocity vector imaging and speckle‐tracking echocardiography: validation against sonomicrometry in an aortic phantom

• DOI: 10.1111/cpf.12410
• Publication Date: 2017-02-07T02:05:20Z
• Authors: Johan Petrini; Maria J. Eriksson; Kenneth Caidahl; Matilda Larsson
• Keywords: Sonomicrometry; Pulsatile flow; Vector flow; Cardiac Imaging; Strain (injury)

Summary Background Evaluation of arterial deformation and mechanics using strain analysis on ultrasound greyscale images has gained increasing scientific interest. The aim this study was to validate in vitro measurements circumferential by velocity vector imaging ( VVI ) speckle‐tracking echocardiography STE against sonomicrometry as a reference method. Method Two polyvinyl alcohol phantoms sized mimic the descending aorta were constructed connected pulsatile flow pump obtain high‐resistance profiles. phantom used for analyses acquired with transesophageal probe. Global regional strains estimated compared sonomicrometry. Results peak correlated well r = 0·90, P ≤0·001; 0·97, ≤0·01) systematic bias −0·78% +0·63%, respectively. levels 1·07–2·54%. Circumferential values obtained significantly lower than those (bias −1·41%, ≤0·001). Conclusion measured correlates However, differ significantly, which should be taken into consideration when comparing results from studies different software aortic measurements.