Panel A, Size comparison between murine drivelines (left) and clinical Heartmate I drivelines (right). Panel B, Implanted murine driveline. S, medial lateral incision used to tunnel the driveline under the dermis; Int. DL, internal part of the implanted driveline; Ext. DL, external part of the driveline. The small panel in the upper right hand corner shows a detailed view of the implanted driveline. Panel C, Schematic illustration of a lateral view of a driveline in the back of a mouse. Figure 1D: Comparison of the histology (Trichrome stain) of the mouse model on the left (implanted 14 days) and the Human driveline on the right (implanted 90 days). The arrows are pointing toward a Dacron fiber imbedded in collagen surrounded by mononuclear cells and collagen.