Catheterization and cardiovascular diagnosis最新文献_第3页

Evaluation of the compressive mechanical properties of endoluminal metal stents. 腔内金属支架压缩力学性能的评价。

Catheterization and cardiovascular diagnosis Pub Date : 1998-06-01 DOI: 10.1002/(sici)1097-0304(199806)44:2<179::aid-ccd11>3.0.co;2-i

S C Schrader, R Beyar

{"title":"Evaluation of the compressive mechanical properties of endoluminal metal stents.","authors":"S C Schrader, R Beyar","doi":"10.1002/(sici)1097-0304(199806)44:2<179::aid-ccd11>3.0.co;2-i","DOIUrl":"https://doi.org/10.1002/(sici)1097-0304(199806)44:2<179::aid-ccd11>3.0.co;2-i","url":null,"abstract":"The mechanical properties of metal stents are important parameters in the consideration of stent design, matched to resist arterial recoil and vascular spasm. The purpose of this study was to develop a system for a standardized quantitative evaluation of the mechanical characteristics of various coronary stents. Several types of stents were compressed by external hydrostatic pressure. The stent diameter was assessed by placing a pair of small ultrasonic sono-crystals on the stent. From pressure-strain diagrams the ultimate strength and radial stiffness for each stent were determined. For all stents, except the MICRO-II and the Wiktor stent, the diameter decreased homogeneously until an ultimate compressive strength was exceeded, causing an abrupt collapse. Expanded to 3 mm, the mechanical behavior of the beStent, the Crown and the Palmaz-Schatz stent (PS153-series) were comparable. The spiral articulated Palmaz-Schatz stent showed twice the strength (1.26 atm) of the PS-153 (0.65 atm). The NIR stent yielded a maximum strength of 1.05 atm. The MICRO-II and the Wiktor stent did not collapse abruptly but rather showed a continuous decline of diameter with increasing external pressure. The Cardiocoil stent behaved in a fully elastic manner and showed the largest radial stiffness. Difference in mechanical properties between stents were documented using a new device specifically developed for that purpose. These mechanical stent parameters may have important clinical implications.","PeriodicalId":9664,"journal":{"name":"Catheterization and cardiovascular diagnosis","volume":"44 2","pages":"179-87"},"PeriodicalIF":0.0,"publicationDate":"1998-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"20555732","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 44

Successful coronary stenting in a 4-year-old child. 4岁儿童冠状动脉支架置入术成功。

Catheterization and cardiovascular diagnosis Pub Date : 1998-06-01 DOI: 10.1002/(sici)1097-0304(199806)44:2<202::aid-ccd14>3.0.co;2-o

J W Moore, M Buchbinder

引用次数: 9

Successful retrieval of a lost coronary stent from the descending aorta using a loop basket intravascular retriever set. 使用环篮血管内回收装置成功地从降主动脉取出丢失的冠状动脉支架。

Catheterization and cardiovascular diagnosis Pub Date : 1998-06-01 DOI: 10.1002/(sici)1097-0304(199806)44:2<224::aid-ccd21>3.0.co;2-l

H Douard, P Besse, J P Broustet

引用次数: 12

Summary of the Mayo Clinic experience with direct left ventricular puncture. 梅奥诊所直接左心室穿刺的经验总结。

Catheterization and cardiovascular diagnosis Pub Date : 1998-06-01 DOI: 10.1002/(sici)1097-0304(199806)44:2<175::aid-ccd10>3.0.co;2-m

S R Ommen, S T Higano, R A Nishimura, D R Holmes

引用次数: 19

Fracture of coronary guidewire during rotational atherectomy with coronary perforation and tamponade. 旋转动脉粥样硬化切除术伴冠状动脉穿孔和填塞时冠状动脉导丝断裂。

Catheterization and cardiovascular diagnosis Pub Date : 1998-06-01 DOI: 10.1002/(sici)1097-0304(199806)44:2<220::aid-ccd20>3.0.co;2-p

S L Woodfield, A Lopez, R R Heuser

引用次数: 45

Micro stent implantation in patients with acute myocardial infarction without anticoagulation: clinical experience with two different antithrombotic protocols. 无抗凝治疗的急性心肌梗死患者微支架植入术:两种不同抗凝方案的临床经验。

Catheterization and cardiovascular diagnosis Pub Date : 1998-06-01 DOI: 10.1002/(sici)1097-0304(199806)44:2<131::aid-ccd1>3.0.co;2-7

P V Oemrawsingh, M J Schalij, W Udayachalerm, E E van der Wall, A V Bruschke

{"title":"Micro stent implantation in patients with acute myocardial infarction without anticoagulation: clinical experience with two different antithrombotic protocols.","authors":"P V Oemrawsingh, M J Schalij, W Udayachalerm, E E van der Wall, A V Bruschke","doi":"10.1002/(sici)1097-0304(199806)44:2<131::aid-ccd1>3.0.co;2-7","DOIUrl":"https://doi.org/10.1002/(sici)1097-0304(199806)44:2<131::aid-ccd1>3.0.co;2-7","url":null,"abstract":"The 4-week outcome following Micro stent implantation for acute myocardial infarction was assessed with the use of two different antithrombotic regimens. The patients were postprocedurally treated with acetyl salicylic acid (ASA) and heparin for 24-48 h (Group I; n = 52), or ASA and ticlopidine plus abciximab if indicated (Group II; n = 52). Stent implantation was successful in 49 patients (94%) of group I and in 46 patients (89%) of group II (NS). Subacute stent thrombosis occurred in nine patients (17%) of group I and in 1 patient (2%) of group II (P < 0.05). There were no significant differences in the rates of mortality, coronary bypass operation, or vascular complications. Micro stent implantation in acute myocardial infarction is highly effective and associated with a low risk for subacute stent thrombosis if the patients are postprocedurally treated with ASA and ticlopidine plus abciximab if indicated.","PeriodicalId":9664,"journal":{"name":"Catheterization and cardiovascular diagnosis","volume":"44 2","pages":"131-7"},"PeriodicalIF":0.0,"publicationDate":"1998-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/(sici)1097-0304(199806)44:2<131::aid-ccd1>3.0.co;2-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"20557065","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Laser wire for crossing chronic total occlusions: "learning phase" results from the U.S. TOTAL trial. Total Occlusion Trial With Angioplasty by Using a Laser Wire. 激光导线用于穿越慢性全闭塞:美国total试验的“学习阶段”结果。激光丝血管成形术的全闭塞试验。

Catheterization and cardiovascular diagnosis Pub Date : 1998-06-01 DOI: 10.1002/(sici)1097-0304(199806)44:2<235::aid-ccd23>3.0.co;2-k

S N Oesterle, J A Bittl, M B Leon, J Hamburger, J E Tcheng, F Litvack, J Margolis, P Gilmore, R Madsen, D Holmes, J Moses, H Cohen, S King, J Brinker, T Hale, D J Geraci, W J Kerker, J Popma

{"title":"Laser wire for crossing chronic total occlusions: \"learning phase\" results from the U.S. TOTAL trial. Total Occlusion Trial With Angioplasty by Using a Laser Wire.","authors":"S N Oesterle, J A Bittl, M B Leon, J Hamburger, J E Tcheng, F Litvack, J Margolis, P Gilmore, R Madsen, D Holmes, J Moses, H Cohen, S King, J Brinker, T Hale, D J Geraci, W J Kerker, J Popma","doi":"10.1002/(sici)1097-0304(199806)44:2<235::aid-ccd23>3.0.co;2-k","DOIUrl":"https://doi.org/10.1002/(sici)1097-0304(199806)44:2<235::aid-ccd23>3.0.co;2-k","url":null,"abstract":"The Prima laser guidewire system (Spectranectics Corp., Colorado Springs, CO) consists of an 0.018\" hypotube containing a bundle of 45-microm optical fibers coupled to a pulsed excimer laser operating at a tip fluence of 60 ml/mm2 and a repetition rate ranging from 25-40 Hz. This laser guidewire was specifically designed to cross total occlusions refractory to passage with conventional wires. The Prima wire was evaluated in a feasibility study at 15 U.S. centers. Following failure to cross a total occlusion with approved guidewires, the Prima wire was utilized in 179 patients. Average age of subjects was 61 yr. Lesion locations included left anterior descending (36%), right (45%), and circumflex (19%) coronary arteries. Mean angiographic age of total occlusions was 70 wk (range, 2-1,020 wk, median, 14 wk). The use of the Prima wire either solely or in combination with conventional guidewires resulted in successful crossing in 61% of these previously impenetrable occlusions. Failure of the device was commonly related to length of the occlusion and tortuosity along the occluded pathway. Major complications included myocardial infarction in 7 patients (3.9%), tamponade in 3 (1.7%), and death in 2 (1.1%). This \"learning phase\" pilot study confirmed the feasibility of a laser guidewire in chronic total occlusions that are resistant to passage of conventional guidewires. An extended registry at these investigative sites is planned.","PeriodicalId":9664,"journal":{"name":"Catheterization and cardiovascular diagnosis","volume":"44 2","pages":"235-43"},"PeriodicalIF":0.0,"publicationDate":"1998-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"20556313","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 19

Inoue balloon for dilatation of aortic stenosis. 井上球囊用于主动脉瓣狭窄扩张。

Catheterization and cardiovascular diagnosis Pub Date : 1998-06-01 DOI: 10.1002/(sici)1097-0304(199806)44:2<248::aid-ccd25>3.0.co;2-h

V K Bahl, S Chandra

引用次数: 0

Percutaneous transluminal coronary angioplasty in a 30-month-old child with embolic long segment occlusion of the left anterior descending artery. 经皮冠状动脉腔内成形术治疗30月龄儿童左前降支栓塞性长段闭塞。

Catheterization and cardiovascular diagnosis Pub Date : 1998-06-01 DOI: 10.1002/(sici)1097-0304(199806)44:2<206::aid-ccd15>3.0.co;2-k

C N Aroney, R N Justo, D J Radford

引用次数: 6

Comparison of quantitative coronary angiographic results after directional coronary atherectomy and balloon angioplasty of protected left main coronary stenosis. 保护性左主干狭窄定向冠脉切除术与球囊成形术定量冠脉造影结果的比较。

Catheterization and cardiovascular diagnosis Pub Date : 1998-06-01 DOI: 10.1002/(sici)1097-0304(199806)44:2<138::aid-ccd2>3.0.co;2-7

H Yasuda, T Hiraishi, S Sumitsuji, Y Nakagawa, A Fukuhara, E Tsuchikane, O Katoh, N Awata, T Kobayashi

{"title":"Comparison of quantitative coronary angiographic results after directional coronary atherectomy and balloon angioplasty of protected left main coronary stenosis.","authors":"H Yasuda, T Hiraishi, S Sumitsuji, Y Nakagawa, A Fukuhara, E Tsuchikane, O Katoh, N Awata, T Kobayashi","doi":"10.1002/(sici)1097-0304(199806)44:2<138::aid-ccd2>3.0.co;2-7","DOIUrl":"https://doi.org/10.1002/(sici)1097-0304(199806)44:2<138::aid-ccd2>3.0.co;2-7","url":null,"abstract":"We compared the angiographic and clinical outcomes after directional coronary atherectomy (DCA, 13 patients) with those after conventional balloon angioplasty (BA, 21 patients) in patients with protected left main coronary artery stenosis. The initial success rate was 100% in the DCA group and 81% (17 of 21) in the BA group. Restenosis was present in 2 of 11 patients in the DCA group and 9 of 16 patients in the BA group (18% vs. 56%, P < 0.05). DCA and BA improved a minimal lumen diameter. The initial gain after DCA was greater than that after BA. At follow-up, the minimal lumen diameter was larger and the percentage diameter stenosis was smaller in the DCA group than in the BA group. The late loss and loss index were equivalent in both groups. Compared with conventional BA, DCA in protected left main coronary artery stenosis is associated with a higher angiographic success rate and provides a wider luminal diameter with reduced incidence of restenosis.","PeriodicalId":9664,"journal":{"name":"Catheterization and cardiovascular diagnosis","volume":"44 2","pages":"138-41"},"PeriodicalIF":0.0,"publicationDate":"1998-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/(sici)1097-0304(199806)44:2<138::aid-ccd2>3.0.co;2-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"20557066","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 9