Wave intensity analysis in mice: an ultrasound-based study in the abdominal aorta and common carotid artery

N. Di Lascio; C. Kusmic; F. Stea; F. Faita

doi:10.1117/12.2254268

13 March 2017 Wave intensity analysis in mice: an ultrasound-based study in the abdominal aorta and common carotid artery

N. Di Lascio, C. Kusmic, F. Stea, F. Faita

Author Affiliations +

Proceedings Volume 10139, Medical Imaging 2017: Ultrasonic Imaging and Tomography; 101390U (2017) https://doi.org/10.1117/12.2254268
Event: SPIE Medical Imaging, 2017, Orlando, Florida, United States

Abstract

Wave Intensity Analysis (WIA) can provide parameters representative of the interaction between the vascular network and the heart. It has been already demonstrated that WIA-derived biomarkes have a quantitative physiological meaning. Aim of this study was to develop an image process algorithm for performing non-invasive WIA in mice and correlate commonly used cardiac function parameters with WIA-derived indexes. Sixteen wild-type male mice (8 weeks-old) were imaged with high-resolution ultrasound (Vevo 2100). Abdominal aorta and common carotid pulse wave velocities (PWVabd, PWVcar) were obtained processing B-Mode and PW-Doppler images and employed to assess WIA. Amplitudes of the first (W1abd, W1car) and the second (W2abd, W2car) local maxima and minimum (Wb_abd,Wb_car) were evaluated; areas under the negative part of the curve were also calculated (NA_abd, NA_car). Cardiac output (CO), ejection fraction (EF) fractional shortening (FS) and stroke volume (SV) were estimated; strain analysis provided strain and strain rate values for longitudinal, radial and circumferential directions (LS, LSR, RS, RSR, CS, CSR). Isovolumetric relaxation time (IVRT) was calculated from mitral inflow PW-Doppler images; IVRT values were normalized for cardiac cycle length. W1abd was correlated with LS (R=0.65) and LSR (R=0.59), while W1_car was correlated with CO (R=0.58), EF (R=0.72), LS (R=0.65), LSR (R=0.89), CS (R=0.71), CSR (R=0.70). Both W2_abd and W2_car were not correlated with IVRT. Carotid artery WIA-derived parameters are more representative of cardiac function than those obtained from the abdominal aorta. The described US-based method can provide information about cardiac function and cardio-vascular interaction simply studying a single vascular site.

Conference Presentation

Citation Download Citation

N. Di Lascio, C. Kusmic, F. Stea, and F. Faita "Wave intensity analysis in mice: an ultrasound-based study in the abdominal aorta and common carotid artery", Proc. SPIE 10139, Medical Imaging 2017: Ultrasonic Imaging and Tomography, 101390U (13 March 2017); https://doi.org/10.1117/12.2254268

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