Prediction for future occurrence of type A aortic dissection using computational fluid dynamics.
Eur J Cardiothorac Surg
; 60(2): 384-391, 2021 07 30.
Article
en En
| MEDLINE
| ID: mdl-33619516
ABSTRACT
OBJECTIVES:
The actual underlying mechanisms of acute type A aortic dissection (AAAD) are not well understood. The present study aimed to elucidate the mechanism of AAAD using computational fluid dynamics (CFD) analysis.METHODS:
We performed CFD analysis using patient-specific computed tomography imaging in 3 healthy control cases and 3 patients with AAAD. From computed tomography images, we made a healthy control model or pre-dissection model for CFD analysis. Pulsatile cardiac flow during one cardiac cycle was simulated, and a three-dimensional flow streamline was visualized to evaluate flow velocity, wall shear stress and oscillatory shear index (OSI).RESULTS:
In healthy controls, the transvalvular aortic flow was parallel to the ascending aorta. There was no spotty high OSI area at the ascending aorta. In pre-dissection patients, accelerated transvalvular aortic flow was towards the posterolateral ascending aorta. The vortex flow was observed on the side of the lesser curvature in mid-systole and expanded throughout the entire ascending aorta during diastole. Systolic wall shear stress was high due to the accelerated aortic blood flow on the side of the greater curvature of the ascending aorta. On the side of the lesser curvature, high OSI areas were observed around the vortex flow. In all pre-dissection cases, a spotty high OSI area was in close proximity to the actual primary entry site of the future AAAD.CONCLUSIONS:
The pre-onset high OSI area with vortex flow is closely associated with the future primary entry site. Therefore, we can elucidate the mechanism of AAAD with CFD analysis.Palabras clave
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Hidrodinámica
/
Disección Aórtica
Tipo de estudio:
Prognostic_studies
/
Risk_factors_studies
Límite:
Humans
Idioma:
En
Revista:
Eur J Cardiothorac Surg
Asunto de la revista:
CARDIOLOGIA
Año:
2021
Tipo del documento:
Article
País de afiliación:
Japón