Determinants of the occurrence of vortex rings in the left ventricle during diastole

Bot, Hans; Verburg, J.; Delemarre, Ben J.; Strackee, J.

doi:10.1016/0021-9290(90)90053-6

Cited by 22 publications

(9 citation statements)

References 14 publications

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“…This is not unexpected, since the strength of a vortex ring depends on the volume of blood injected into the ventricle (Bot et al 1990), which is severely reduced in end-stage heart failure patients. Furthermore, it was noted that the vortex core area is smaller in the DCM ventricle than in the healthy situation.…”

Section: Resultsmentioning

confidence: 84%

Influence of dilated cardiomyopathy and a left ventricular assist device on vortex dynamics in the left ventricle

Loerakker

Cox

Heijst

et al. 2008

Computer Methods in Biomechanics and Biomedical Engineering

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Together with new developments in mechanical cardiac support, the analysis of vortex dynamics in the left ventricle has become an increasingly important topic in literature. The aim of this study was to develop a method to investigate the influence of a left ventricular assist device (LVAD) on vortex dynamics in a failing ventricle. An axisymmetric fluid dynamics model of the left ventricle was developed and coupled to a lumped parameter model of the complete circulation. Simulations were performed for healthy conditions and dilated cardiomyopathy (DCM). Vortex structures in these simulations were analysed by means of automated detection. Results show that the strength of the leading vortex ring is lower in a DCM ventricle than in a healthy ventricle. The LVAD further influences the maximum strength of the vortex and also causes the vortex to disappear earlier in time with increasing LVAD flows. Understanding these phenomena by means of the method proposed in this study will contribute to enhanced diagnostics and monitoring during cardiac support.

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Section: Resultsmentioning

confidence: 84%

Influence of dilated cardiomyopathy and a left ventricular assist device on vortex dynamics in the left ventricle

Loerakker

Cox

Heijst

et al. 2008

Computer Methods in Biomechanics and Biomedical Engineering

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“…This adverse impact should be amplified in the presence of ventricular dilatation with attendant diastolic ventriculoannular disproportion [23]. Bot et al validated that LV diastolic inflow volume and the size of the LV play a possible role in vortex ring formation [24]. Baccani et al have also predicted in mathematical models that the presence of global LV dysfunction, such as in dilated cardiomyopathy; the LV filling vortex would result in increased intensity and longer stagnation near the apex [25].…”

Section: Discussionmentioning

confidence: 97%

Intuitive visualization and quantification of intraventricular convection in acute ischemic left ventricular failure during early diastole using color Doppler-based echocardiographic vector flow mapping

Lü

Zhang

et al. 2011

Int J Cardiovasc Imaging

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The aim of this study was to make an intuitive visualization of intraventricular convection (IC) and quantification of intraventricular convection velocity (ICV) in acute ischemic left ventricular (LV) failure of open-chest canines during early diastole contrast to the baseline conditions using color Doppler-based echocardiographic vector flow mapping (VFM). The animal care committee approved this prospective study. In 6 anesthetized open-chest beagle models, the emergence time and the emergence sites of IC in the LV cavity during early diastole were visualized at the standard apical 3-chamber (AP3c) views with the VFM at baseline conditions and after coronary artery ligation. The global ICV and the ICV at the basal, middle and apical levels of LV at the AP3c views at T1, T2, T3, T4, and T5 between both states were compared respectively (T1: the beginning of LV rapid filling period; T2: the middle of LV rapid filling period; T3: the peak of LV rapid filling period; T4: the middle of period of reduced filling; T5: the end of early diastole.). Acute ischemic LV failure with a marked increase in LV end diastolic volume and LV minimal diastolic pressure was induced by coronary artery ligation. The IC appeared only during the period of reduced filling at baseline conditions, and limited to the basal level of LV cavity. But the IC appeared throughout all the early diastole, and was seen almost occupying whole LV cavity during ischemia. The peak of the global ICV for both states appeared at T4. The global ICV at the AP3c views in acute ischemic failure LV cavity increased than those of baseline conditions at the T1 (6.593 ± 0.834 cm(2)/s vs. 0.000 ± 0.000 cm(2)/s, P < 0.001), T2 (9.457 ± 0.852 cm(2)/s vs. 0.000 ± 0.000 cm(2)/s, P < 0.001), T3 (14.765 ± 1.791 cm(2)/s vs. 2.030 ± 0.502 cm(2)/s, P < 0.001), T4 (25.392 ± 4.640 cm(2)/s vs. 6.688 ± 1.343 cm(2)/s, P < 0.001), and T5 (15.890 ± 3.159 cm(2)/s vs. 2.518 ± 0.869 cm(2)/s, P < 0.001). And the ICV at the basal, middle and apical levels at AP3c views in acute ischemic failure LV cavity also increased than those of baseline conditions at the same phase of early diastole (P < 0.01), except for the ICV at the LV basal level at T1. VFM is a powerful tool for visualization IC and quantification of ICV on profiles of LV flow fields, which can give intriguing insights into the subtle, flow-associated LV fluid dynamics of normal and abnormal cardiac function. It will be of great practical importance to elucidate the accurate physiological and the pathophysiological significance of the IC in further studies, so as to determine whether the cardiac function can be precisely evaluated with IC related index, and to incorporate VFM into clinical routine practice in the future.

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“…In the late 1980s and early 1990s several clinical studies have examined the spatial dependent differences of the intra-ventricular flow in the diseased left ventricle during the cardiac cycle [36][37][38] . Simultaneously, numerical and in vitro simulations provided a theoretical framework, explaining the observations [39,40] . From this research [36][37][38] it was concluded that travelling vortices especially are a feature of left ventricles that have become pathologically dilated.…”

Section: Haemodynamics Of Left Ventricular Fillingmentioning

confidence: 99%

Diastolic Filling and Pressure Imaging: Taking Advantage of the Information in a Colour M-mode Doppler Image

Mey

Sutter

Vierendeels

et al. 2001

European Journal of Echocardiography

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The ability to derive non-invasively information on left ventricular diastolic function on one hand and pressure gradients on the other hand, makes Doppler ultrasound a very attractive tool in clinical practice. However, the limitations of the standard Doppler approaches in differentiating between normal and pseudonormal filling patterns, together with the limitations of the simplified Bernoulli equation for assessing pressure gradients, are well described. In this manuscript the role of colour M-mode Doppler echocardiography as a tool that can overcome these limitations is discussed. Relevant key concepts of the haemodynamics of left ventricular filling and its relationship with colour M-mode Doppler echocardiography are introduced.

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Determinants of the occurrence of vortex rings in the left ventricle during diastole

Cited by 22 publications

References 14 publications

Influence of dilated cardiomyopathy and a left ventricular assist device on vortex dynamics in the left ventricle

Influence of dilated cardiomyopathy and a left ventricular assist device on vortex dynamics in the left ventricle

Intuitive visualization and quantification of intraventricular convection in acute ischemic left ventricular failure during early diastole using color Doppler-based echocardiographic vector flow mapping

Diastolic Filling and Pressure Imaging: Taking Advantage of the Information in a Colour M-mode Doppler Image

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