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Figure 5 Time Sequence Analysis of LV Flow During Diastole and IVC Period in Normal Subjects
In the early diastolic period (A), an irrotational flow associated with early left ventricular (LV) filling dominated the vector representation of flow. In diastasis, a relatively apically located vortex was seen (B, arrow). This was followed by a late filling phase that was characterized by an irrotational flow obscuring the vortex (C). In the early isovolumic contraction (IVC) period, the vortex was relocated in the proximity of the anterior mitral leaflet in the LVOT region (D, arrow). During the late IVC period, the vortex persisted in the left ventricular outflow tract region and directed flow towards aortic valve (E). With the aortic valve opening and ejection (F), the vortex dissipated with continued flow from apex to left ventricular outflow tract. Early diastole: 16 ms after mitral valve opening (A); diastasis: 142 ms after mitral valve opening (B); late diastole: 298 ms after mitral valve opening (C); IVC-1: 16 ms after mitral valve closure (D); IVC-2: 80 ms after mitral valve closure (E); ejection: 102 ms after mitral valve opening (F). See Online Videos 3 and 4.
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