Key result
Right ventricular diastolic vortex rings formed during both early and late filling phases and were significantly more elliptical and located closer to the annulus compared to left ventricular rings.
Cross-Sectional (n=10)
No
Absolute Event Rate: 0.67% vs 0.8%
p-value: p=<0.05
4D flow MRI demonstrates that right ventricular diastolic vortex rings form during both early and late filling phases, differing in shape and position from left ventricular rings, which may play a role in diastolic blood flow optimization.
4D flow MRI shows distinct RV vortex patterns; hypothesis-generating for diastolic optimization and requires prospective validation before clinical relevance.
Background Efficient right ventricular (RV) pumping function requires optimal blood flow dynamics. In the left ventricle (LV), diastolic vortex ring formation distal to the mitral valve (MV) has been reported to be an important mechanism for such blood flow optimization. Earlier work based on computational fluid dynamic s( CFD) simulations using simplified RV geometry modeling have reported vortex ring formation in the RV during the early filling phase and its breakdown at the late diastolic phase. However, neither those CFD studies have characterized vortex rings nor have they been confirmed by 4D flow MRI. The purpose of this study was to investigate and characterize the formation of vortex rings during diastolic filling in the RV and to compare them with those of LV in healthy volunteers.
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Elbaz et al. (2014) conducted a cross-sectional in Healthy (n=10). Right ventricular diastolic vortex rings vs. Left ventricular diastolic vortex rings was evaluated on Circularity index of early (E) filling vortex rings (p=<0.05). Right ventricular diastolic vortex rings formed during both early and late filling phases and were significantly more elliptical and located closer to the annulus compared to left ventricular rings.
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