Abstract
Newborns with single ventricle physiology are usually palliated with a multi-staged procedure. When cardiovascular complications e.g., collateral vessel formation occur during the inter-stage periods, further treatments are required. An 8-month-old patient, who underwent second stage (i.e., bi-directional Glenn, BDG) surgery at 4 months, was diagnosed with a major veno-venous collateral vessel (VVC) which was endovascularly occluded to improve blood oxygen saturations. Few clinical data were collected at 8 months, whereas at 4 months a more detailed data set was available. The aim of this study is threefold: (i) to show how to build a patient-specific model describing the hemodynamics in the presence of VVC, using patient-specific clinical data collected at different times; (ii) to use this model to perform virtual VVC occlusion for quantitative hemodynamics prediction; and (iii) to compare predicted hemodynamics with post-operative measurements. The three-dimensional BDG geometry, resulting from the virtual surgery on the first stage model, was coupled with a lumped parameter model (LPM) of the 8-month patient’s circulation. The latter was developed by scaling the 4-month LPM to account for changes in vascular impedances due to growth and adaptation. After virtual VVC closure, the model confirmed the 2 mmHg BDG pressure increase, as clinically observed, suggesting the importance of modeling vascular adaptation following the BDG procedure.
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Abbreviations
- APC:
-
Aorto-pulmonary collateral vessels
- BDG:
-
Bi-directional Glenn
- BSA:
-
Body surface area
- CO :
-
Cardiac output
- CHD:
-
Congenital heart disease
- IVC:
-
Inferior vena cava
- LB:
-
Lower body
- LPM:
-
Lumped parameter model
- MRI:
-
Magnetic resonance imaging
- O2 :
-
Oxygen
- PA:
-
Pulmonary artery
- PVR :
-
Pulmonary vascular resistance
- PVWP:
-
Pulmonary venous wedge pressure
- RPA:
-
Right pulmonary artery
- SVC:
-
Superior vena cava
- SVR LB :
-
Lower body systemic vascular resistance
- SVR UB :
-
Upper body systemic vascular resistance
- 3D:
-
Three-dimensional
- UB:
-
Upper body
- VVC:
-
Veno-venous collateral vessel
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Acknowledgments
This study was supported by Fondation Leducq, Paris, through the Trans-Atlantic Network of Excellence for Cardiovascular Research grant ‘Multi-Scale Modelling of Single Ventricle Hearts for Clinical Decision Support’.
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Associate Editor Umberto Morbiducci oversaw the review of this article.
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Corsini, C., Baker, C., Baretta, A. et al. Integration of Clinical Data Collected at Different Times for Virtual Surgery in Single Ventricle Patients: A Case Study. Ann Biomed Eng 43, 1310–1320 (2015). https://doi.org/10.1007/s10439-014-1113-6
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DOI: https://doi.org/10.1007/s10439-014-1113-6