Universität zu Köln

Giese, Daniel ORCID: 0000-0002-3925-4441, Weiss, Kilian ORCID: 0000-0003-4295-4585, Baessler, Bettina ORCID: 0000-0002-3244-3864, Madershahian, Navid, Choi, Yeong-Hoon, Maintz, David and Bunck, Alexander C. (2018). In vitro evaluation of flow patterns and turbulent kinetic energy in trans-catheter aortic valve prostheses. Magn. Reson. Mat. Phys. Biol. Med., 31 (1). S. 165 - 173. NEW YORK: SPRINGER. ISSN 1352-8661

Full text not available from this repository.

Abstract

The objective of the current work was to evaluate flow and turbulent kinetic energy in different transcatheter aortic valve implants using highly undersampled time-resolved multi-point 3-directional phase-contrast measurements (4D Flow MRI) in an in vitro setup. A pulsatile flow setup was used with a compliant tubing mimicking a stiff left ventricular outflow tract and ascending aorta. Five different implants were measured using a highly undersampled multi-point 4D Flow MRI sequence. Velocities and turbulent kinetic energy values were analysed and compared. Strong variations of turbulent kinetic energy distributions between the valves were observed. Maximum turbulent kinetic energy values ranged from 100 to over 500 J/m(3) while through-plane velocities were similar between all valves. Highly accelerated 4D Flow MRI for the measurement of velocities and turbulent kinetic energy values allowed for the assessment of hemodynamic parameters in five different implant models. The presented setup, measurement protocol and analysis methods provides an efficient approach to compare different valve implants and could aid future novel valve designs.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Giese, Daniel UNSPECIFIED orcid.org/0000-0002-3925-4441 UNSPECIFIED Weiss, Kilian UNSPECIFIED orcid.org/0000-0003-4295-4585 UNSPECIFIED Baessler, Bettina UNSPECIFIED orcid.org/0000-0002-3244-3864 UNSPECIFIED Madershahian, Navid UNSPECIFIED UNSPECIFIED UNSPECIFIED Choi, Yeong-Hoon UNSPECIFIED UNSPECIFIED UNSPECIFIED Maintz, David UNSPECIFIED UNSPECIFIED UNSPECIFIED Bunck, Alexander C. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-197629
DOI:	10.1007/s10334-017-0651-y
Journal or Publication Title:	Magn. Reson. Mat. Phys. Biol. Med.
Volume:	31
Number:	1
Page Range:	S. 165 - 173
Date:	2018
Publisher:	SPRINGER
Place of Publication:	NEW YORK
ISSN:	1352-8661
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language PHASE-CONTRAST MRI; CARDIOVASCULAR MAGNETIC-RESONANCE; PULSE-WAVE VELOCITY; HEART-VALVE; BLOOD-FLOW; TRANSCATHETER; IMPLANTATION; REPLACEMENT; STENOSIS; ATHEROSCLEROSIS Multiple languages Radiology, Nuclear Medicine & Medical Imaging Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/19762