Original articleAdult cardiacTransapical Mitral Valved Stent Implantation
Section snippets
Material and Methods
A self-expanding valved stent intended for transapical implantation into an atrioventricular heart valve was constructed. The new valved stent has three components: (1) an atrial fixation system consisting of ultrathin high-density polyester covered metal springs (35 to 48 mm); (2) a ventricular body made of a nitinol self-expanding stent (Nitinol Devices & Components, Fremont, CA) that accommodates a bioprosthetic heart valve (diameter, 25 to 32 mm); and (3) a ventricular fixation system.
Results
Procedural data are listed in Table 1. All animals exhibited normal hemodynamics immediately after mitral valved stent implantation and maintained stability for the entire 60 minutes of monitoring. Atrial and ventricular ectopic beats occurred during preparation of apical access and during valve deployment in all animals. No sustained or hemodynamically relevant arrhythmias were recorded. The mean mitral valve annular diameter was 23.3 mm, ranging from 21 to 27 mm. Surgical preparation of
Comment
In the current study most of the difficulties related to valved stent implantation in the mitral position were avoided. Transesophageal echocardiography allowed satisfactory visualization to guide the transapical mitral valved stent implantation. Radial force in the current stent design was used mostly for stent expansion and had only a minor role in anchoring the stent, which eliminated the risk of LVOT obstruction either directly or by SAM. In our experiments the chordae tendineae only
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Cited by (0)
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These authors contributed equally to this manuscript.