Seiki Nagata

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OBJECTIVES The goal of this study was to use angioscopy to investigate the amount of neointimal coverage after sirolimus-eluting stent (SES) implantation. BACKGROUND Sirolimus-eluting stents reduce intimal hyperplasia. METHODS We used angioscopy to evaluate 37 consecutive stented coronary artery lesions (15 SES and 22 bare-metal stents [BMS]) in 25(More)
OBJECTIVE We investigated the role of the angiosome concept in endovascular therapy (EVT) for limb salvage. BACKGROUND The angiosome concept is clinically useful in bypass surgery for critical limbs ischemia (CLI). However, comparison with direct and indirect flow to the site of ulceration based on angiosome concept regarding freedom from amputation has(More)
BACKGROUND No-reflow associated with direct angioplasty (PCI) of patients with acute coronary syndromes (ACS) is associated with unfavorable results. METHODS AND RESULTS We used a new thrombectomy device to treat 51 lesions in 48 consecutive ACS patients (40 male and 8 female; mean age 63 years) and conducted a microscopic analysis of aspirates and blood(More)
BACKGROUND The time course of neointimal formation after stent implantation has not been studied extensively by angioscopy in the drug-eluting stent era. METHODS AND RESULTS Serial angioscopic findings at first follow-up (3.6+/-1.1 months), second follow-up (10.5+/-1.6 months), and third follow-up (21.2+/-2.2 months) after stent implantation were compared(More)
Stent fracture has emerged as a new problem in the percutaneous transluminal angioplasty of the superficial femoral artery (SFA). The aim of our study was to delineate the factors influencing nitinol stent fracture in the SFA. Forty consecutive patients with peripheral artery disease who underwent rescue stenting with a nitinol stent (Luminexx, Bard) in the(More)
OBJECTIVES We investigated the time course of stent patency in the femoro-popliteal artery for as long as 4 years. BACKGROUND Stent fracture has been related to poor 2-year patency in the femoro-popliteal artery. METHODS We studied 239 consecutive patients who underwent provisional de novo stenting with nitinol stents for 333 limbs (Luminexx stent [C.(More)
Plaque characterization by intravascular ultrasound (IVUS) before percutaneous coronary intervention (PCI) was evaluated in 81 consecutive patients with acute myocardial infarction (AMI) to establish if IVUS can predict the occurrence of the 'no-reflow' phenomenon. Angiographic no-reflow was defined as TIMI flow grade 1 or 2 without any mechanical(More)
OBJECTIVES We sought to investigate the timing of restenosis and the restenosis factors following nitinol stenting in the superficial femoral artery (SFA). BACKGROUND Restenosis following nitinol stenting in the SFA remains unsolved. METHODS We analyzed 742 limbs in consecutive 585 patients who underwent successful endovascular therapy for de novo SFA(More)
OBJECTIVES We angioscopically compared paclitaxel-eluting stents (PES) and sirolimus-eluting stents (SES) to explore differences in arterial healing. BACKGROUND Drug-eluting stents may demonstrate different arterial healing processes. METHODS Angioscopy was performed 9 +/- 2 months after 30 PES and 36 SES were implanted initially in the native coronary(More)
We encountered a case of plasmablastic extramedullary plasmacytoma with multiple myeloma. Histological findings revealed that the extramedullary plasmacytoma of this patient was of the plasmablastic type, which was positive for λ-stain and EBV-encoded RNA. In contrast, bone marrow aspiration demonstrated a common-type multiple myeloma, which was positive(More)