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. 2020 Dec:74:46-55.
doi: 10.1016/j.mri.2020.08.024. Epub 2020 Sep 2.

Feasibility and validation of trans-valvular flow derived by four-dimensional flow cardiovascular magnetic resonance imaging in pacemaker recipients

Christopher E D Saunderson  1 , Maria F Paton  1 , Amrit Chowdhary  1 , Louise A E Brown  1 , John Gierula  1 , Anshuman Sengupta  2 , Christopher Kelly  1 , Pei G Chew  1 , Arka Das  1 , Thomas P Craven  1 , Rob J van der Geest  3 , David M Higgins  4 , Liang Zhong  5 , Klaus K Witte  1 , John P Greenwood  1 , Sven Plein  1 , Pankaj Garg  6 , Peter P Swoboda  7
Affiliations

Feasibility and validation of trans-valvular flow derived by four-dimensional flow cardiovascular magnetic resonance imaging in pacemaker recipients

Christopher E D Saunderson et al. Magn Reson Imaging. 2020 Dec.
No abstract available

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Figures

Fig. 1
Fig. 1
Example of segmentation of valvular flow contours on the phase contrast multiplanar reconstruction. For the tricuspid valvular flow, we just excluded the area with artefact from through plane valvular flow quantification (orange arrow). The right hand panel demonstrates flow curves for the same patient in AOO mode with comparable stroke volumes through the 3 valvular planes.
Fig. 2
Fig. 2
Qualitative assessment of flow in the raw data prior to valvular plane reconstruction. Even though poor quality for tricuspid flow was more often noted, by removing the miscalculated pixels, we were able to quantify tricuspid stroke volume.
Fig. 3
Fig. 3
Scatter plots of aortic stroke volume (SV) against mitral and tricuspid SV for AOO and DOO pacing modes to investigate consistency between methods. Excellent correlation was noted for all (r>0.95).
Fig. 4
Fig. 4
Bland-Altman analysis for the assessment of aortic stroke volume (SV) against mitral and tricuspid SV for AOO and DOO pacing modes. No significant differences was noted on Bland-Altman analysis.
Fig. 5
Fig. 5
Comparison of LV short-axis cine and 4D flow derived stroke volumes (SV). Bland-Altman plots were used to investigate any significant bias between cine SV and 4D flow derived SV. The Bland-Altman analysis did not demonstrate any significant bias between cine SV and the 4D flow methods derived SV (P>0.05).
Fig. 6
Fig. 6
A case example demonstrating two dimensional velocity vectors superimposed over cine images in a patient with a pacemaker and right ventricular pacing lead (orange arrow). No significant artefacts were noted.
See this image and copyright information in PMC

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