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Figure 2 Transmyocardial implant (TMI) device. The helical TMI is constructed of stainless steel and has a large anchor coil (on right in figure) on one end to prevent migration once the device has been implanted in the myocardium. For implantation, the TMI is mounted on a stainless steel delivery device (not shown), which has a sharp needle-like tip allowing it to pierce the epicardium. This places the distal end of the TMI into the epicardium; the TMI coil is then twisted through the myocardium using the delivery device such that the TMI spans the entire wall of the heart. An indicator on the delivery device confirms transmural penetration, after which the delivery device is removed, leaving the TMI intact.
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