Michael Schueppert

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PURPOSE We analyzed a current 78-month experience with externally supported (ringed) polytetrafluoroethylene (PTFE) axillobifemoral (AxBF) and axillounifemoral (AxUF) bypass grafts to address the controversy about whether the addition of a femorofemoral limb to an axillofemoral bypass graft improves the patency results. METHODS Between January 1988 and(More)
PURPOSE This study evaluated the value of preoperative cardiac screening with dipyridamole thallium scintigraphy and radionuclide ventriculography in vascular surgery patients. METHODS From July 1, 1989, to Dec. 31, 1991, we routinely (irrespective of the patient's cardiac history or symptomatology) performed dipyridamole thallium scintigraphy (DTS) and(More)
OBJECTIVE To evaluate the need for color duplex surveillance (CDS) for pure in situ bypasses beyond 6 months. DESIGN We reviewed our in situ surveillance data from August 1987 to April 1994. Lower-extremity revascularization was performed using 245 pure in situ greater saphenous vein bypasses in 219 patients. The CDS of the entire bypass and inflow and(More)
When users search online for a business, the search engine may present them with a list of related business recommendations. We address the problem of constructing a useful and diverse list of such recommendations that would include an optimal combination of substitutes and complements. Substitutes are similar potential alternatives to the searched(More)
We present a secondary ranking system to find and remove erroneous suggestions from a geospatial recommendation system. We discover such anomalous links by "double checking" the recommendation system's output to ensure that it is both structurally cohesive, and semantically consistent. Our approach is designed for the Google Related Places Graph, a(More)
OBJECTIVES We analysed our results with the use of aortic polytetrafluoroethylene PTFE grafts over the last 7.5 years. A historical comparison was also made between the results with non-stretch PTFE (NS-PTFE) (1987-91) and stretch PTFE (S-PTFE) grafts (1991-94). MATERIALS 244 infrarenal aortic replacements or bypasses with PTFE grafts were performed at(More)
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