Search Results
Results 701 - 750 of 1368
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Sankardas M A - - 1995
BACKGROUND: Directional coronary atherectomy is a percutaneous technique which extends the role of balloon angioplasty to bulky eccentric coronary lesions. AIMS: To report the early experience, clinical results, complications and histopathological findings of directional coronary atherectomy (DCA) in proximal left anterior descending artery (LAD) stenosis. METHODS: Study of 25 lesions ...
Rozenman Y - - 1995
This study examines the effect of coronary angioplasty on the progression and appearance of new disease in sites of the coronary tree that were not dilated by the balloon. We examined 355 pairs of coronary angiograms from 252 patients. The study consisted of consecutive patients who were referred for catheterization ...
Wilensky R L - - 1995
BACKGROUND: Several nonatherosclerotic animal models of restenosis exist and are used for the evaluation of the vascular response to angioplasty-induced injury. However, few studies have evaluated the response of an atherosclerotic vessel to angioplasty. The present study examined the radiographic, histological, immunohistochemical, and morphometric responses over time of atherosclerotic rabbit ...
Lee H Y - - 1995
A 11-year-old girl developed left main coronary artery osteal stenosis after Takayasu's arteritis for which she underwent Percutaneous Transluminal Coronary Angioplasty (PTCA). The narrowing of the left coronary artery was successfully dilated by angioplasty without apparent complication. This one suggests that PTCA may have a potential advantage as a temporary ...
Motarjeme A - - 1995
The role of percutaneous angioplasty in the management of chronic iliac artery occlusions is controversial. This article reviews 7 years of experience in treating patients with complete chronic iliac artery occlusions (n = 99) by using thrombolysis and angioplasty. Patients were not excluded due to age or length of the ...
Rees M R - - 1995
Coronary angioplasty was successfully carried out with an activated guidewire technique in 33 of 47 patients who had undergone a failed attempt at conventional angioplasty for the treatment of chronic coronary artery occlusion. 80% of these occlusions were stump-like occlusions. This technique involves the attachment of a hand-held battery-driven motorised ...
Guazzi M - - 1995
In a 65-year-old man with Polycythemia Vera, invalidating angina pectoris was associated with severe narrowing of the right coronary artery. After percutaneous coronary angioplasty (PTCA) the patient became symptom free and remained so for 12 months, while receiving an antiplatelet agent, a calcium antagonist and nitrate. Coronary angiography repeated after ...
Röthlisberger C - - 1995
A patient with symptomatic pliable mitral stenosis and a significant lesion in the right coronary artery underwent combined interventional procedures during a single session. After an uneventful transseptal puncture that allowed full anticoagulation with heparin, a percutaneous transluminal coronary angioplasty was performed, yielding an unsatisfactory result and necessitating stent implantation. ...
Robinson N M - - 1995
Haemorrhagic complications are well recognized when heparin is used during percutaneous transluminal coronary angioplasty (PTCA). We present a 74-year-old female who developed a large acute spontaneous haemothorax 20 h after coronary angioplasty. Spontaneous haemothorax has rarely been described and is predominantly associated with pulmonary embolism. In the absence of a ...
Nakano S - - 1995
A 50-year-old male presented with severe atherosclerotic stenosis of the basilar artery at its origin with very poor blood flow distally, manifesting as sudden onset of deterioration of consciousness to semicomatose with decerebrate posture. He regained consciousness dramatically after acute thrombolysis, although right hemiparesis persisted due to left pontine infarction. ...
Shea K W - - 1995
Bacteremia after diagnostic cardiac catheterization is uncommon, but bacteremia after percutaneous transluminal coronary angioplasty (PTCA) has not been studied prospectively. Unlike diagnostic cardiac catheterization, PTCA involves the use of an indwelling arterial sheath after completion of the procedure, which is connected to a pressurized heparin solution, both of which increase ...
Gramatikov B - - 1995
Electrocardiographic recordings of patients with coronary artery stenosis, made before and after angioplasty, were analyzed by the multiresolution wavelet transform (MRWT) technique. The MRWT decomposes the signal of interest into its coarse and detail components at successively finer scales. MRWT was carried out on different leads in order to compare ...
Steurer J - - 1995
OBJECTIVES: An alternative therapeutic approach to popliteal artery entrapment syndrome (PAES) with vascular complications. MATERIALS: Three male patients (16, 42 and 68 years) with thrombotic and/or embolic obstructions of popliteal or crural vessels as a consequence of popliteal entrapment syndrome. METHODS: Combined catheter treatment consisting of percutaneous transluminal thrombembolectomy (PTEE), ...
Metz D - - 1995
The use of 6 French guiding catheters is still usually limited to elective percutaneous transluminal coronary angioplasty. We describe our preliminary experience with this guiding size to perform a double guide wire procedure for angioplasty or coronary bifurcation lesions, to protect (n = 5) and/or to sequentially dilate (n = ...
Macdonald R L - - 1995
To define the pathological effects of angioplasty on vasospastic arteries, 36 rabbits underwent angiography and induction of vasospasm by placement of blood-filled (vasospasm groups) or empty (control group) silastic sheaths around the cervical carotid arteries. Two (Day 2) or 7 days (Day 7) later, angiography was repeated and one carotid ...
Clark W M - - 1995
BACKGROUND AND PURPOSE: Percutaneous transluminal angioplasty (PCTA) is increasingly used to treat extracerebral arterial stenosis. The present study evaluates the safety and efficacy of PCTA treatment of symptomatic intracranial atherosclerotic stenosis. METHODS: A series of 22 vessels in 17 patients were treated with PCTA. All patients had recurrent neurological symptoms ...
Tobias S L - - 1995
The angiographic incidence of intramyocardial bridging (MB) is 0.7-4.5% [Angelini et al.: Prog Cardiovasc Dis 25:75-88, 1983]. Morphological and physiological patterns of MB have recently been described, observing coronary flow velocity patterns, intravascular ultrasound, and angiography [Flynn et al.: Cathet Cardiovasc Diagn 32:36-39, 1994; Ge et al.: Circ Res 89:1725-1732, ...
Touho H - - 1995
Nineteen patients between 56 and 76 years of age with clinically symptomatic atherosclerotic stenotic lesions at or distal to the C-5 segment in the carotid arterial system underwent percutaneous transluminal angioplasty (PTA). The 19 patients had a total of 19 stenotic lesions, including two lesions in the C-5 segment, three ...
Grasso M - - 1995
Caliceal diverticular calculi are most often asymptomatic and of little clinical significance. In certain cases they may be associated with flank pain, pyuria and chronic urinary tract infections. Treatment has evolved from open surgical techniques to a purely endoscopic approach. Percutaneous techniques are frequently used to address the diverticular stone ...
Macdonald R L - - 1995
BACKGROUND AND PURPOSE: We tested the hypothesis that vasospastic arteries do not reconstrict after angioplasty because angioplasty decreases smooth muscle contractility. METHODS: Twenty-four rabbits had carotid angiography and placement of silicone elastomer sheaths around both carotid arteries in the neck. Sheaths were empty (control groups) or filled with clotted blood ...
Unni N M - - 1995
BACKGROUND: Disease of the femoral and popliteal arteries, though one of the commonest manifestations of atherosclerosis, is under-recognized because the morbidity it produces is less catastrophic than coronary or cerebrovascular arterial involvement. Percutaneous transluminal angioplasty is performed for femoro-popliteal lesions at different centres in India, but post-angioplasty follow up data ...
Douglas S A - - 1995
OBJECTIVE: The aim was to assess whether or not the endothelin ETA receptor selective antagonist BQ-123 could inhibit neointima formation in vivo following balloon angioplasty. METHODS: The effect of either acute administration of BQ-123 (0.1 mg.kg-1.min-1 intra-arterial infusion for 1 h before and 1 h after angioplasty) or chronic administration ...
Smyth D W - - 1995
Angioplasty for occluded coronary arteries is less successful than for sub-total stenoses. The Magnarail system (Schneider) has been designed to improve success rates. We used the system in 112 patients with coronary occlusions (TIMI flow < or = 1) which the operator felt suitable for angioplasty. It was successful (defined ...
Odink H F - - 1995
PURPOSE: The clinical efficacy of 44 successful conventional and laser-assisted recanalizations of the femoropopliteal artery was assessed in a noncomparative study by the life-table method. METHODS: Laser-assisted angioplasty using continuous laser and a sapphire probe was performed to achieve primary recanalization in femoral artery occlusions when conventional guidewire recanalization had ...
Joseph D - - 1995
Mechanical distortion of tortuous coronary arteries mimicking spasm or dissection during percutaneous transluminal coronary angioplasty due to balloon guidewire systems has previously been reported. This case reports a similar phenomenon in the peripheral vascular system induced by a diagnostic catheter. Recognition of this pseudo lesion may help to avoid complications ...
Henderson L J - - 1995
Percutaneous transluminal balloon angioplasty (PTBA) is a minimally invasive and effective adjunct treatment for patients with atherosclerotic peripheral vascular disease. This surgical technique involves placing an intraarterial balloon within an obstructing arterial lesion and forcibly dilating the balloon under fluoroscopy. The PTBA technique has become an accepted interventional therapy for ...
Murray J G - - 1995
PURPOSE: To assess angioplasty as a treatment for symptomatic long-segment (> or = 10 cm) femoropopliteal atherosclerotic disease. MATERIALS AND METHODS: Angioplasty performed on 44 lesions that measured 10-40 cm (mean, 24.3 cm) were assessed for technical success and 12-24-month patency. Disease severity was assessed with the Doppler ankle-brachial index ...
Pimentel C X - - 1995
Marked angulation and tortuosity of the coronary arteries, particularly the circumflex, can limit coronary angioplasty. Despite the use of adequate guide catheter support and high performance guidewires, it is often difficult or even impossible to reach the distal segment of the target vessel with the guidewire. We describe three cases ...
Chen J S - - 1995
BACKGROUND: The intracoronary Doppler flow velocity measurement is widely used. The Doppler flow catheter, used in many studies, still cannot always measure distal portions of coronary artery stenosis. However, three years ago, a low profile Doppler angioplasty guide wire (0.018-inch) was started by apply for measurement of changes in proximal ...
Hong M K - - 1995
A dual-purpose angioplasty catheter with intramural channels and exterior pores for local drug delivery ("channeled balloon") was studied in eight atherosclerotic human necropsy arteries and in 22 rabbits with atherosclerotic peripheral arteries, in which markers (0.005 microns to 15 microns) were infused locally at 2 atmospheres during simultaneous angioplasty at ...
Stikovac M - - 1995
To correlate angiographic stenoses, pressure gradients, and intravascular Doppler velocity measurements, we studied 12 patients with failing hemodialysis shunts who were undergoing percutaneous transluminal angioplasty. Seven patients had a stenosis at the site of venous anastomosis, two had a stenosis of the central vein, and three had stenoses at both ...
Hartnell G G - - 1995
To determine whether the use of hydrophilic guidewires has influenced the success of peripheral percutaneous transluminal angioplasty (PTA), the results of PTA performed before and after the introduction of such guidewires (end of 1989) were analyzed. Before hydrophilic guidewires became generally available, the technical success rates for iliac stenosis PTA ...
Freund N - - 1995
The simultaneous use of two guiding catheters during angioplasty has been previously described for native coronary artery bifurcation lesions. We describe a case in which a dual guiding catheter, dual guidewire technique is used for angioplasty of a native vessel lesion spanning the anastomotic site of a sequential saphenous vein ...
Danchin N - - 1995
Chronic total coronary occlusion remains one of the limitations of percutaneous transluminal coronary angioplasty, and few therapeutic devices are specifically designed to address this problem. Among such devices, low-speed rotational angioplasty could improve the primary success rate of the procedure but has never been studied in a controlled trial. One ...
Henry M - - 1995
PURPOSE: In order to assess the role of percutaneous peripheral rotational ablation using Rotablator, 150 symptomatic patients (94 males, 56 females; mean age 73 +/- 1 years, range 42 to 90) having 212 complex peripheral vascular lesions were treated. METHODS: Fifty percent of lesions were below the knee; 65% of ...
Ozdil E - - 1995
Percutaneous transluminal coronary angioplasty of anomalous coronary arteries presents several technical challenges to interventional cardiologists. Choosing the best guiding catheter and other equipment is crucial to the technical success of the procedure. We performed successful coronary angioplasty of an anomalous left anterior descending artery lesion in a 51-year-old man who ...
Ledley Gary S. - - 1995
Newer developments in biotechnology and increasing operator experience have broadened the clinical applicability of percutaneous transluminal coronary angioplasty. These advances have allowed the treatment of patients with variant and anomalous coronary arteries and the treatment of an increasingly elderly population. A case of successful percutaneous transluminal coronary angioplasty in a ...
Walker J - - 1995
An in-situ saphenous vein graft occluded because of retained valve cusps. After aspiration thrombectomy, percutaneous transluminal balloon angioplasty was performed, but reocclusion occurred 11 months later. Following a second aspiration thrombectomy, the restenosed retained cusps were resected using the Simpson percutaneous atherectomy catheter. The graft remained patent until the patient's ...
Lammer J - - 1995
This review gives a short overview of the results of 15 years of experimental and clinical work on laser angioplasty. Experimentally, photothermal and photomechanical ablation of plaque could be demonstrated. However, laser angioplasty did not cause reduction of platelet adhesion and intimal hyperplasia. Clinically, the technique of laser angioplasty was ...
Kardaras F G - - 1995
We report a case of bacterial arteritis of the external iliac artery complicated by mycotic aneurysm following coronary angioplasty. To our knowledge, this is the first reported instance of arterial wall infection caused by coronary angioplasty at a distance from the insertion site equal to the length of the sheath.
Matsi P - - 1995
To determine the utility of percutaneous transluminal angioplasty (PTA) in the treatment of chronic critical lower-limb ischaemia, a prospective study of 103 consecutive patients (117 limbs) was performed. A total of 209 lesions were treated in the iliac (n = 4), femoropopliteal (n = 121), and intrapopliteal (n = 84) ...
Ragosta M - - 1995
BACKGROUND AND OBJECTIVE: Pulsed laser may lessen vascular damage and reduce restenosis. This study examined the acute and chronic effects of midinfrared laser angioplasty with and without balloon angioplasty in atherosclerotic femoral arteries in rabbits. STUDY DESIGN/MATERIALS AND METHODS: Atherosclerosis was induced in arteries by air desiccation and cholesterol feeding. ...
Yasuhara H - - 1995
The influences of atherogenic response on restenosis after transluminal balloon angioplasty and the anastomosis of arterial reconstruction were investigated. Iliac transluminal balloon angioplasty was performed on 81 consecutive patients at 86 sites, between January, 1987 and December, 1992. A balloon angioplasty alone was performed in 58 patients at 60 sites, ...
Okada M - - 1995
In recent years, lasers are being utilized in cardiovascular surgery. Since the 1980's we have investigated angioplasty using an Argon laser for patients with obstructive arterial diseases. This technique aims to open the obstructive arterial lumen. Based on the excellent results of experimental studies, the technique has been clinically applied. ...
Giller C A - - 1995
BACKGROUND: Elevated transcranial Doppler (TCD) velocities seen after cerebral angioplasty are commonly interpreted as evidence of residual or recurrent stenosis but may conceivably arise from hyperemia and require different clinical management. SUMMARY OF REPORT: Four cases of abnormally elevated mean TCD velocities obtained after therapeutic arterial dilation with either balloon ...
Ikeda H - - 1994
We investigated whether percutaneous transluminal coronary angioplasty (PTCA) would induce neutrophil activation in patients with coronary artery disease. Blood samples were taken from the coronary sinus in 14 patients who underwent PTCA and in 9 control subjects who underwent coronary arteriography (CAG). Flow cytometry was used to measure membrane surface ...
Mager A - - 1994
Of 180 consecutive patients who underwent uneventful percutaneous transluminal coronary angioplasty (PTCA), 25 (13.9%) had at least 1 episode of symptomatic bradycardia and hypotension during the early postprocedure period. Symptomatic bradycardia and hypotension occurred 1 to 10 hours (mean 4 +/- 2) after PTCA. A higher incidence of symptomatic bradycardia ...
Gertz S D - - 1994
BACKGROUND: Restenosis after balloon angioplasty of coronary arteries is thought to be a proliferative response of the arterial wall to injury. Recently, it has been suggested that geometric remodeling of the arterial wall, rather than intimal fibromuscular hyperplasia, may be the major pathophysiological mechanism underlying restenosis. In this study, we ...
Ohte N - - 1994
A seventy-one-year-old woman suffering from angina pectoris had a superdominant left anterior descending artery with a 95% stenosis just after it extended the apex. This superdominant artery was demonstrated angiographically by the findings that it ran in the posterior interventricular sulcus and reached the crux of the heart. Percutaneous transluminal ...
Tsai F Y - - 1994
PURPOSE: To report three patients, each of whom had acute rethrombosis of a reopened middle cerebral artery after urokinase treatment for proximal stenosis (percutaneous transluminal angioplasty of the stenosis was performed adjunctive to the thrombolytic treatment to preserve the success of the thrombolysis), and a fourth patient who had percutaneous ...
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