NDLI: Vortex Ring Formation in the Left Ventricle of the Heart: Analysis by 4D Flow MRI and Lagrangian Coherent Structures

Content Provider	Springer Nature Link
Author	Töger, Johannes Kanski, Mikael Carlsson, Marcus Kovács, Sándor J. Söderlind, Gustaf Arheden, Håkan Heiberg, Einar
Copyright Year	2012
Abstract	Recent studies suggest that vortex ring formation during left ventricular (LV) rapid filling is an optimized mechanism for blood transport, and that the volume of the vortex ring is an important measure. However, due to lack of quantitative methods, the volume of the vortex ring has not previously been studied. Lagrangian Coherent Structures (LCS) is a new flow analysis method, which enables in vivo quantification of vortex ring volume. Therefore, we aimed to investigate if vortex ring volume in the human LV can be reliably quantified using LCS and magnetic resonance velocity mapping (4D PC-MR). Flow velocities were measured using 4D PC-MR in 9 healthy volunteers and 4 patients with dilated ischemic cardiomyopathy. LV LCS were computed from flow velocities and manually delineated in all subjects. Vortex volume in the healthy volunteers was 51 ± 6% of the LV volume, and 21 ± 5% in the patients. Interobserver variability was −1 ± 13% and interstudy variability was −2 ± 12%. Compared to idealized flow experiments, the vortex rings showed additional complexity and asymmetry, related to endocardial trabeculation and papillary muscles. In conclusion, LCS and 4D PC-MR enables measurement of vortex ring volume during rapid filling of the LV.
Starting Page	2652
Ending Page	2662
Page Count	11
File Format	PDF
ISSN	00906964
Journal	Annals of Biomedical Engineering
Volume Number	40
Issue Number	12
e-ISSN	15739686
Language	English
Publisher	Springer US
Publisher Date	2012-07-18
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Diastole Diastolic function 4D flow LCS Intracardiac Blood flow Magnetic resonance CMR Hemodynamics Biomedicine general Biophysics and Biological Physics Biomedical Engineering Biochemistry Mechanics
Content Type	Text
Resource Type	Article
Subject	Biomedical Engineering

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