scholarly journals Estimation of pulse wave velocity in main pulmonary artery with phase contrast MRI: Preliminary investigation

2006 ◽  
Vol 24 (6) ◽  
pp. 1303-1310 ◽  
Author(s):  
Hsu-Hsia Peng ◽  
Hsiao-Wen Chung ◽  
Hsi-Yu Yu ◽  
Wen-Yih I. Tseng
Author(s):  
Soroush Heidari Pahlavian ◽  
Steven Yong Cen ◽  
Xiaoming Bi ◽  
Danny J. J. Wang ◽  
Helena Chang Chui ◽  
...  

Author(s):  
E. LeMaster ◽  
S. Lee ◽  
N. Alperin

This pilot study describes approaches for the estimation of the pulse wave velocity (PWV) of cerebrospinal fluid (CSF) in the upper spinal canal. The movement of CSF was non-invasively measured using phase-contrast magnetic resonance imaging (PCMRI) technique. Two main approaches were used to calculate PWV. The approaches relied on different types of images: sagittal and axial images. For the method using axial images, the PWV was calculated using four different time delays. This preliminary investigation indicated that the most reliable method used axial images and the waveforms' onset times to calculate PWV. CSF's PWV may be of importance in a condition known as Chiari Malformation (CM), a brain disorder in which the cerebral tonsils herniate into the spinal canal. The present study investigated the PWV of CSF in five healthy volunteers compared to that of five symptomatic CM patients.


Author(s):  
Kathryn Broadhouse ◽  
Anthony N Price ◽  
Giuliana Durighel ◽  
Anna Finnemore ◽  
David J Cox ◽  
...  

2014 ◽  
Vol 8 (4) ◽  
pp. 165
Author(s):  
Priyanka Bhattacharya ◽  
Chandrahasa Sharabu ◽  
Deepa Rawat ◽  
Scott Akers ◽  
Anjaneyulu Dunde ◽  
...  

2017 ◽  
Vol 122 (5) ◽  
pp. 1088-1094 ◽  
Author(s):  
Gonçalo Teixeira de Almeida Silva ◽  
Bruce B. Guest ◽  
Diego E. Gomez ◽  
Martine McGregor ◽  
Laurent Viel ◽  
...  

Calcification of the tunica media of the axial pulmonary arteries (PA) has been reported in a large proportion of racehorses. In humans, medial calcification is a significant cause of arterial stiffening and is implicated in the pathogenesis of cardiac, cerebral, and renal microvascular diseases. Pulse wave velocity (PWV) provides a measure of arterial stiffness. This study aimed to develop a technique to determine PA-PWV in horses and, secondarily, to investigate a potential association between PA-PWV and arterial fibro-calcification. A dual-pressure sensor catheter (PSC) was placed in the main PA of 10 sedated horses. The pressure waves were used to determine PWV along the PA, using the statistical phase offset method. Histological analysis of the PA was performed to investigate the presence of fibro-calcified lesions. The mean (±SD) PWV was 2.3 ± 0.7 m/s in the proximal PA trunk and 1.1 ± 0.1 m/s further distal (15 cm) in a main PA branch. The mean (±SD) of mean arterial pressures in the proximal PA trunk was 30.1 ± 5.2 mmHg, and 22.0 ± 6.0 mmHg further distal (15 cm) within the main PA branch. The mean (±SD) pulse pressure in the proximal PA trunk was 15.0 ± 4.7 mmHg, and 13.5 ± 3.3 mmHg further distal (15 cm) within the main PA branch. Moderate to severe lesions of the tunica media of the PAs were observed in seven horses, but a correlation with PWV could not be established yet. Pulmonary artery PWV may be determined in standing horses. The technique described may allow further investigation of the effect of calcification of large PAs in the pathogenesis of equine pulmonary circulatory disorders. NEW & NOTEWORTHY Pulmonary artery pulse wave velocity was determined safely in standing sedated horses. The technique described may allow further investigation of the effect of calcification of large pulmonary arteries in the pathogenesis of pulmonary circulatory disorders in horses.


Sign in / Sign up

Export Citation Format

Share Document