Developing an Experimental Database for Mitral Valve Computational Modeling, Surgical Repair, and Device Evaluation

Author(s):  
Jean-Pierre M. Rabbah ◽  
Neelakantan Saikrishnan ◽  
Andrew W. Siefert ◽  
Ajit P. Yoganathan

Numerical models of the heart’s mitral valve are being used to study valve biomechanics, facilitate predictive surgical planning, and are used in the design and development of repair devices. These models have evolved from simple two-dimensional approximations to complex three-dimensional fully coupled fluid structure interaction models. However, to date these models lack direct one-to-one experimental validation. Moreover, as computational solvers vary considerably based on researcher implementation, experimental benchmark data are critically important to ensure model accuracy. To this end, a multi-modality in-vitro pulsatile left heart simulator was used to establish a database of geometric and hemodynamic boundary conditions coupled with resultant valvular and fluid mechanics.

2018 ◽  
Vol 35 (9) ◽  
pp. 1342-1350 ◽  
Author(s):  
Mirian M. Pardi ◽  
Pablo M. A. Pomerantzeff ◽  
Roney Orismar Sampaio ◽  
Maria C. Abduch ◽  
Carlos M. A. Brandão ◽  
...  

2010 ◽  
Vol 20 (S3) ◽  
pp. 100-106 ◽  
Author(s):  
William T. Mahle ◽  
Joseph Kreeger ◽  
Norman H. Silverman

AbstractThere is a collection of rare congenital cardiac defects that can produce significant haemodynamic embarrassment. Owing to their rarity, these lesions may be overlooked or mistaken for other more common congenital cardiac defects. Using careful segmental echocardiographic techniques, such as multiple planes of imaging and inferential Doppler findings, it is possible to identify these lesions and thus plan surgical management. Some of the lesions of importance reviewed include the aortopulmonary window, the aorto-ventricular tunnels, the aorto-atrial tunnels, and aneurysm of the sinuses of Valsalva. Some conditions such as the aortopulmonary window and aneurysm of the sinuses of Valsalva often occur in the setting of other congenital cardiac lesions. At times, the presence of coexisting lesions may mask some of the characteristic features of these defects. With prompt identification, all of these rare conditions are amenable to complete surgical repair. Newer modalities such as three-dimensional echocardiography can further enhance surgical planning.


Author(s):  
Manuel Rausch ◽  
Wolfgang Bothe ◽  
John-Peder Escobar-Kvitting ◽  
Serdar Goktepe ◽  
Craig Miller ◽  
...  

Throughout the cardiac cycle the Mitral Valve (MV) experiences complex mechanical and hemodynamic loading [1]. Dysfunction of the MV may have devastating consequences and has been associated with high morbidity and mortality. Surgical repair techniques are available to treat malfunctioning MVs [2]. However, it is likely that interventions such as surgical repair may cause alterations in the loading conditions and associated deformations of the MV. In consequence such alterations could result in detrimental remodeling and disturb normal valve function. It is therefore essential to characterize the MV under in-vivo conditions as accurately as possible and thereby establish a baseline of the normal valve. Even though excellent research has been conducted in-vivo [3], in-vitro [4], as well as in-silico [5], the Anterior Mitral Valve Leaflet (AMVL) has never been characterized from a mechanical perspective across its entire surface. The goal of this study is, hence, to provide a more complete picture of the deformations across the entire AMVL in the beating heart.


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