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Computational modelling of the hybrid procedure in hypoplastic left heart syndrome : a comparison of zero-dimensional and three-dimensional approach.

Young, Andrew and Gourlay, Terry and McKee, Sean and Danton, Mark H.D. (2014) Computational modelling of the hybrid procedure in hypoplastic left heart syndrome : a comparison of zero-dimensional and three-dimensional approach. Medical Engineering and Physics, 36 (11). pp. 1549-1553. ISSN 1350-4533

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Abstract

Previous studies have employed generic 3D-multiscale models to predict haemodynamic effects of the hybrid procedure in hypoplastic left heart syndrome. Patient-specific models, derived from image data, may allow a more clinically relevant model. However, such models require long computation times and employ internal pulmonary artery band [dint] dimension, which limits clinical application. Simpler, zero-dimensional models utilize external PAB diameters [dext] and provide rapid analysis, which may better guide intervention. This study compared 0-D and 3-D modelling from a single patient dataset and investigated the relationship dint versus dext and hemodynamic outputs of the two models. Optimum oxygen delivery defined at dint = 2 mm corresponded to dext = 3.1 mm and 3.4 mm when models were matched for cardiac output or systemic pressure, respectively. 0-D and 3-D models when matched for PAB dimension produced close equivalence of hemodynamics and ventricular energetics. From this study we conclude that 0-D model can provide a valid alternative to 3D-multiscale in the hybrid–HLHS circulation.