ISSN:0896-4327    

DOI:10.1111/j.1540-8183.1989.tb00747.x

出版商:Blackwell Publishing Ltd    

年代:1989

数据来源: WILEY

摘要:

Intravascular stents were conceived to improve the management of complications after PTCA. The beneficial effects of stents are thought to be due largely to the improvement of the primary PTCA result. To confirm this hypothesis, we have measured transstenotic gradients before and after stenting. Coronary pressure measurements were taken in 17 patients at the time of PTCA as well as before and after the implantation of a self‐expand‐able intracoronary mesh endoprosthesis. Before stenting the mean residual pressure gradient was 21 mmHg; after implantation of the endoprosthesis this pressure gradient dropped to a mean of 2 mmHg. This observation confirms the angio‐graphic observation of improvement of the primary result of PTCA by stenting. (J Interven Car‐diol 1

ISSN:0896-4327    

DOI:10.1111/j.1540-8183.1989.tb00748.x

出版商:Blackwell Publishing Ltd    

年代:1989

数据来源: WILEY

摘要:

Subselective coronary access guide catheters are described for use with the ProbeTMballoon on a wire coronary dilatation device. These access catheters provide the following advantages over the “naked” ProbeTM: (1) Guide catheter stabilization, (2) Lesion access, (3) Lesion visualization, (4) Lesion crossing, and (5) Lesion protection. The Probe/access catheter system was used in 51 patients on 132 lesions (average 2.6 lesions/patient; range 1–8 lesions/patient) of which 116 (88%) were dilated successfully. Failures tended to be in total occlusions or in eccentric subtotal occlusions that could not be crossed with the ProbeTMtip wire. No patient required emergency coronary bypass. One patient sustained a small myocardial infarction within 24 hours of the procedure. One patient developed hemopericardium after rupture of a small branch coronary artery. One patient died from intracerebral bleeding due to thrombolytic and anticoagulant therapy. The ProbeTMaccess catheter system has several advantages over the ProbeTMdevice alone, and future developments can be expected to extend these benefits. (J Inter‐ven Cardiol 1

ISSN:0896-4327    

DOI:10.1111/j.1540-8183.1989.tb00749.x

出版商:Blackwell Publishing Ltd    

年代:1989

数据来源: WILEY

摘要:

Human atherosclerotic xenograft arteries implanted in five mongrel dogs were subjected to in‐traluminal angioplasty using CO2laser radiation. CO2laser energy was delivered through a silver halide fiber, 0.9 mm in diameter and 100 cm long, inserted into a 6 Fr angiographic catheter. Results indicated that the technique is feasible, relatively simple and may have a low potential for perforation. (J Interven Cardiol 1989:2:

ISSN:0896-4327    

DOI:10.1111/j.1540-8183.1989.tb00750.x

出版商:Blackwell Publishing Ltd    

年代:1989

数据来源: WILEY

摘要:

The early experience at the University of Michigan with the Rashkind ASD occluder in three children with a secundum atrial septal defect (ASD) is reported. Successful transcatheter ASD closure was accomplished in one child. The procedure was not successful in the other two. In one, the ASD occluder was inadvertently implanted in the right atrium. The ASD was successfully closed in the other child, but the occluder device partially detached from the atrial septum 4 days later and required emergency surgical retrieval from the left atrium. Based on this early experience, revisions in the occluder device and the technique of its delivery are suggested that should improve the safety and efficacy of transcatheter ASD occlusion in the future.

ISSN:0896-4327    

DOI:10.1111/j.1540-8183.1989.tb00751.x

出版商:Blackwell Publishing Ltd    

年代:1989

数据来源: WILEY

摘要:

Implanting an unused or redundant epicardial ventricular pacing electrode in children at the time of initial electrode placement for later use is a common practice. To investigate the ultimate utilization of this redundant electrode, the records of 38 children who had undergone implantation of 47 redundant epicardial electrodes between 1974 and 1987 were reviewed. As the primary electrode remains functional, 12 electrodes have not been in‐vasively tested or used; 11 were in nine children lost to follow‐up. The remaining 24 redundant electrodes implanted in 16 children, (ages 1 day to 18 years, median 5 years, at implantation) together with the utilized electrode were evaluated at the time of pacing system revision. At implant, all electrodes had thresholds<1.4 volts at a pulse duration of0.5 msec. At follow‐up 0.2 to 11.7 years (mean 3.7 years) after implant, an electrode was considered functional if the threshold at 0.5 msec pulse duration was<2.5 volts, and 14 of 24 redundant electrodes were nonfunctional. Of the ten functional redundant electrodes, the active electrode was functional in seven cases. In only three of 24 cases was the redundant electrode functional when the active electrode was nonfunctional. In all cases, when the active electrode exhibited exit block, the redundant electrode also exhibited exit block. Two of five redundant electrodes paired with a fractured active electrode were fractured. Two other redundant electrodes were fractured when the active electrode was functional. The state of the redundant and the active electrode was the same in 80% of the cases, P<0.03. Of the 36 redundant electrodes implanted for which follow‐up data is available, 33 had not been used by the end of the study period. (J Interven Cardiol 1

ISSN:0896-4327    

DOI:10.1111/j.1540-8183.1989.tb00752.x

出版商:Blackwell Publishing Ltd    

年代:1989

数据来源: WILEY

摘要:

A case is presented of a patient who had undergone internal mammary artery bypass grafting and subsequently developed angina pectoris and cere‐brovascular insufficiency as the result of a single proximal subclavian artery stenosis. The patient's ischemic symptoms resolved following successful angioplasty of the subclavian lesion. The status of the brachiocephalic circulation should be considered in patients presenting with angina following internal mammary artery bypass grafting and preoperatively in patients who are being considered for this procedure. (J Interven Cardiol 1989:2:

ISSN:0896-4327    

DOI:10.1111/j.1540-8183.1989.tb00753.x

出版商:Blackwell Publishing Ltd    

年代:1989

数据来源: WILEY

摘要:

A case of retrograde coronary angioplasty of native and branch vessels in a patient with prior bypass surgery is presented. The procedure was performed through the vein graft. This unusual, complex approach was employed due to inaccessibility of the lesion antegrade via the native vessel. (J Interven Cardiol 1989:2:1)

ISSN:0896-4327    

DOI:10.1111/j.1540-8183.1989.tb00754.x

出版商:Blackwell Publishing Ltd    

年代:1989

数据来源: WILEY

摘要:

Book reviewed in this article:Interventional Cardiology. David R. Holmes, Jr., M.D. and Ronald E. Vlietstra, M.B.

ISSN:0896-4327    

DOI:10.1111/j.1540-8183.1989.tb00755.x

出版商:Blackwell Publishing Ltd    

年代:1989

数据来源: WILEY