Search Results
Results 351 - 400 of 662
< 3 4 5 6 7 8 9 10 11 12 13 >
Tamborini Gloria - - 2012
The aims of this study were to analyze in a large series of patients undergoing transcatheter aortic valve implantation (TAVI): 1) the accuracy of 3-dimensional transesophageal echocardiographic (3DTEE) measurement of left coronary cusp (LCC) length and of the distances from left main coronary ostium (LM) to the aortic annulus (AA) ...
Nishimura Satoshi - - 2012
Histopathological examination is not suitable for sequential in vivo analysis of arterial healing after stenting because it can be performed only after the animals are killed. Optical coherence tomography (OCT) provides higher resolution than intravascular ultrasound (IVUS). The aim of this study was to compare arterial healing images after stenting ...
Hayatsu Yukihiro - - 2012
Accurate measurement of pressure gradients on echocardiography across a Starr-Edwards (SE) ball valve is difficult due to its unique flow pattern. The decision of indication for reoperation on the valve requires multifactorical evaluation. We report a surgical case with an aortic SE ball valve 43 years after implantation. There was no ...
Kawarada Osami - - 2012
OBJECTIVES: To elucidate the optimal cut-off and accuracy of duplex ultrasonography (DUS) parameters for in-stent restenosis (ISR) after nitinol stenting in the superficial femoral artery (SFA). BACKGROUND: Few data are available regarding the performance of DUS for binary ISR based on quantitative vessel analysis (QVA) in the era of SFA ...
Barre E - - 2012
Tricuspid valve malformation is a rare congenital heart disease. Prenatal diagnosis of Ebstein's anomaly (EA) and tricuspid valve dysplasia (TVD) is associated with high mortality. There are conflicting reports concerning accurate prognostication after diagnosis in utero. The aim of our study was to assess prognostic factors based on our experience. ...
Poon Karl K C - - 2012
Transcatheter aortic valve replacements lower mortality in patients not suitable for surgical valve replacement compared to conservative treatment. Transcatheter valve-in-valve implants have been shown to be feasible in failed bioprostheses in aortic, mitral, pulmonary and tricuspid positions. We report the first Australasian experience of a transapical mitral valve-in-valve placement with ...
Neville R F - - 2012
OBJECTIVES: The endovascular first approach has led to increasing complexity for surgical bypass especially in those patients without autogenous conduit. The use of vein interposed at the distal anastomosis has been reported to improve the results of prosthetic grafts. This series expands our initial experience with the distal vein patch ...
De Bock S - - 2012
The presented study details the virtual deployment of a bifurcated stent graft (Medtronic Talent) in an Abdominal Aortic Aneurysm model, using the finite element method. The entire deployment procedure is modeled, with the stent graft being crimped and bent according to the vessel geometry, and subsequently released. The finite element ...
Darwood R J - - 2012
OBJECTIVES: The NHS Abdominal Aortic Aneurysm Screening Programme (NAAASP), based on the Multicentre Aneurysm Screening Study (MASS) trial (2002), is being introduced across the UK. Recent studies have demonstrated a decline in prevalence of abdominal aortic aneurysm (AAA). The aim of this study was to examine the effect of this ...
Pierot Laurent - - 2012
OBJECTIVES: To compare 3D-TOF magnetic resonance angiography (MRA) and contrast-enhanced MRA (CE-MRA) sequences at 3T in the follow-up of coiled aneurysms with digital subtracted angiography (DSA) as the gold standard. METHODS: DSA, 3D-TOF and CE-MRA were performed in a prospective series of 126 aneurysms in 96 patients (57 female, 39 ...
- - 2012
The following articles are being highlighted as part of Circulation's Topic Review series. This series will summarize the most important manuscripts, as selected by the editors, published in Circulation and the Circulation subspecialty journals. The studies included in this article represent the articles related to pulmonary hypertension that were published ...
Chalouhi Nohra - - 2012
BACKGROUND:: Recent reports have shown that stent-assisted coiling (SAC) is associated with lower aneurysm recanalization rates compared to conventional coiling, raising questions about the necessity of achieving high packing density (PD) in stented aneurysms. OBJECTIVE:: To assess the impact of PD on follow-up obliteration rates of stented aneurysms and attempt ...
Kwon Woocheol - - 2012
We aimed to prospectively assess the optimal cutoff value for a minimum lumen cross-sectional area (CSA) on a 64-slice multidetector computed tomography (MDCT) compared with an intravascular ultrasound (IVUS). In 39 patients with 43 stents, the minimum lumen diameter, stent diameter, diameter stenosis, minimum lumen CSA, stent CSA, and area ...
Nour Sayed - - 2012
OBJECTIVE: Pulmonary arterial hypertension (PAH) is a dysfunctional endothelium disease with increased pulmonary vascular resistance (PVR) and poor prognosis. Current therapies are still insufficient. Here we propose a new pulsatile device as a more effective tool for PAH management compared with traditional treatments. MATERIALS AND METHODS: Twelve piglets (10.3 ± 3.8 kg) were ...
Willson Alexander B - - 2012
This study sought to evaluate the structural integrity of balloon-expandable stents used in transcatheter aortic valve replacement. Underexpansion, deformation, or fracture of stent frames may affect transcatheter heart valve (THV) function and durability. Patients >1 year after transcatheter aortic valve replacement underwent multidetector computed tomography. Geometry of the stent frame ...
Hodgkiss-Harlow Kelley - - 2012
Purpose: To compare the accuracy of inferior vena cava (IVC) filter placement using a bedside technique guided by intravascular ultrasound (IVUS) with a concurrent experience of filter deployment with fluoroscopic venogram imaging. Methods: From November 2006 to December 2009, 195 consecutive IVC filters were placed to prevent pulmonary embolism in ...
Gundert T - - 2012
Coronary stent design influences local patterns of wall shear stress (WSS) that are associated with neointimal growth, restenosis and the endothelialization of stent struts. The number of circumferentially repeating crowns (NC) for a given stent design is often modified depending on the target vessel caliber, but the hemodynamic implications of ...
Alurkar A - - 2012
We present a unique case of ipsilateral stroke in a 55-year-old right-handed hypertensive man with proven uncrossed pyramidal tract demonstrated by tractography. Diffusion-weighted imaging disclosed small acute ischemic infarcts in the right corona radiata with MR angiography showing narrowing of the right internal carotid artery. Significant carotid stenosis of right ...
Brennecka Celeste R - - 2012
This study examines the in vitro characteristics of a crosslinking polymer system for cerebral aneurysm embolization. The polymeric material is composed of poly(propylene glycol)diacrylate (PPODA) and pentaerythritol tetrakis(3-mercaptopropionate) (QT), formulated with the liquid contrast agents Conray™ or Omnipaque™ 300. The PPODA-QT system was tested for delivery feasibility through mock delivery ...
Acharya U Rajendra - - 2012
Plaques in the carotid artery result in stenosis, which is one of the main causes for stroke. Patients have to be carefully selected for stenosis treatments as they carry some risk. Since patients with symptomatic plaques have greater risk for strokes, an objective classification technique that classifies the plaques into ...
Sherif C - - 2012
BACKGROUND AND PURPOSE:The initial angiographic occlusion rate is the strongest predictor of later rebleeding in previously ruptured coil-embolized cerebral aneurysms. Angiographic estimations of aneurysmal occlusion rates are, however, subjective in nature and confounded by methodologic problems. COR has been developed, and its superiority has been experimentally established to overcome subjective ...
Popelová Jana - - 2012
BACKGROUND: Elevated levels of N-terminal pro-brain natriuretic peptide (NT-proBNP) are an expected finding in many adults with congenital heart disease (ACHD) but no reports have described the range of values within different diagnostic groups. METHODS: Between the years 2003 and 2011 we measured NT-proBNP in consecutive ACHD patients attending the ...
Zafar Abdul Mueed - - 2012
Although intervention in asymptomatic carotid artery stenosis remains controversial, most carotid interventions are performed in asymptomatic individuals. Carotid duplex ultrasound is the diagnostic test that precedes more than 90% of carotid interventions. In terms of economic incentives, providers who perform carotid artery revascularization may experience synergy if they also provide ...
Park Chang-Woo CW Department of Otolaryngology, The Catholic University of Korea College of Medicine, Incheon St. Mary's Hospital, Incheon, - - 2012
Pulsatile tinnitus arising from an aberrant internal carotid artery at the level of the nasopharynx is rarely found. We present a case of a 74-year-old woman complaining of pulsatile tinnitus in the right ear. The tinnitus was not audible by auscultation. Endoscopic examination revealed pulsating swelling of the nasopharyngeal wall ...
Yang Chih-Pei Ou - - 2012
This study analyzes the experience of a single center using hybrid stainless steel-based endovascular stent graft repair of acute complicated and chronic type B aortic dissection aneurysm, and assesses the proximal and distal aortic morphologic changes of the midterm results. Between November 2006 and March 2011, 61 patients with type ...
Saitoh Takeji - - 2012
The present study sought to elucidate the geometry of the left ventricular outflow tract (LVOT) in patients with aortic stenosis and its effect on the accuracy of the continuity equation-based aortic valve area (AVA) estimation. Real-time 3-dimensional transesophageal echocardiography (RT3D-TEE) provides high-resolution images of LVOT in patients with aortic stenosis. ...
Bazeed Mohamed Fayez - - 2012
BackgroundProsthetic bileaflet mechanical valve function has been traditionally evaluated using echocardiography and fluoroscopy. Multidetector computed tomography (MDCT) is a novel technique for cardiac evaluation.PurposeTo evaluate bileaflet mechanical aortic valves using a low-milliampere (mA), non-contrast MDCT protocol with a limited scan range.Material and MethodsForty patients with a bileaflet mechanical aortic valve ...
Cho Youngjin - - 2012
AimsAdditional linear ablation lesions are created to improve the outcomes of pulmonary vein (PV) isolation during atrial fibrillation (AF) ablation. We aimed to evaluate the safety and feasibility of additional ablation sites in terms of anatomical characteristics.Methods and resultsMulti-detector computed tomography (MDCT) data from 140 consecutive patients (40 with AF, ...
Huber Agnes J T - - 2012
Objective: Arterial allografts are routinely employed for reconstruction of infected prosthetic grafts. Usually, banked cryopreserved arteries are used; however, existing conventional freezing cryopreservation techniques applied to arteries are expensive. In contrast, a new ice-free cryopreservation technique results in processing, storage and shipping methods that are technically simpler and potentially less ...
Basturk T - - 2012
Background: Resistive index (RI) is an indirect measurement of blood flow resistance that can be used to evaluate vascular damage. Aims: The purpose of this study is to evaluate the association between RI values of orbital and intrarenal arteries by means of Doppler ultrasonography (US). Methods: We evaluated 103 diabetic ...
Earnshaw J J - - 2012
A nationally funded aortic aneurysm screening programme for 65 year old men commenced in 2009 in England. The aim is to implement screening by commissioning local programmes covering populations of over 800,000 to a national standard. By April 2012 approximately 80 per cent of England will be covered, with the ...
Wu Yi-Zhe - - 2012
First generation drug-eluting stents (DESs) were based on 316L stainless steel and coated with a permanent polymer. The vessel wall of these DESs was inflammatory and late in-stent thrombosis was reported. Hence, cobalt chromium based DES coated with a bioabsorbable polymer was an alternate choice. Cobalt chromium based DES with ...
Kondo Norihiro - - 2012
The recurrence of regurgitation after surgical mitral valve (MV) repair remains a significant clinical problem. Mitral annuloplasty rings are commonly used in MV repair procedures. The purpose of this study was to demonstrate the feasibility of transvenous valve-in-ring (VIR) implantation using the Melody valve (Medtronic, Minneapolis, MN), which is a ...
Shemirani Hasan - - 2012
OBJECTIVE: Epicardial fat is an indirect contact with coronary arteries. There are some studies about the relationship between this fat and metabolic syndrome and it has considered as an indicator of cardiovascular risk. Several studies have addressed the association between epicardial fat thickness (EFT) and coronary artery disease (CAD) with ...
Kahilogullari Gokmen - - 2012
Object The branching structure of the middle cerebral artery (MCA) remains a debated issue. In this study the authors aimed to describe this branching structure in detail. Methods Twenty-seven fresh, human brains (54 hemispheres) obtained from routine autopsies were used. The cerebral arteries were first filled with colored latex and ...
Rankin J Scott - - 2012
OBJECTIVETo increase applicability and stability of aortic valve repair, a three-dimensional aortic annuloplasty ring has been developed for intra-annular placement. The goal of this study was to test the safety of this device with in vivo implantation in the calf model.METHODSIn 10 chronic calves, the HAART annuloplasty ring was sutured ...
Kitamura Tadashi - - 2012
Prosthetic valve endocarditis involving other valves and cardiac structures requires complex surgical reconstruction, which is sometimes accompanied by uncontrollable bleeding. We report the case of a 41-year old man who developed prosthetic aortic valve endocarditis with paravalvular abscess affecting the intervalvular fibrous body, the mitral valve and other cardiac structures. ...
Hammer Peter E - - 2012
Aortic valve reconstruction using leaflet grafts made from autologous pericardium is an effective surgical treatment for some forms of aortic regurgitation. Despite favorable outcomes in the hands of skilled surgeons, the procedure is underutilized because of the difficulty of sizing grafts to effectively seal with the native leaflets. Difficulty is ...
Günebakmaz Ozgür - - 2012
We aimed to investigate copeptin levels in mitral stenosis (MS) patients and the behavior of copeptin after hemodynamic improvement achieved by percutaneous balloon mitral valvuloplasty (PBMV). The study involved 29 consecutive symptomatic patients with moderate to severe rheumatic MS who underwent PBMV. Twenty-eight age- and gender-matched healthy volunteers composed the ...
Morrens Astrid - - 2012
We describe a case of a middle-aged woman, known with situs inversus totalis. She was suffering from progressive dyspnoea. With different imaging techniques we came to the correct diagnosis, a partial abnormal pulmonary venous return, which was surgically confirmed. Although the structure was complex, the treatment was simple.
- - 2012
The following are highlights from the series, Circulation: Cardiovascular Interventions Topic Review. This series summarizes the most important manuscripts, as selected by the editors, which have published in the Circulation portfolio. The studies included in this article represent the most noteworthy research in the areas of transcatheter aortic valve replacement ...
Thompson Andrew - - 2012
A Vascath dialysis line was inserted under direct ultrasound guidance into the left internal jugular vein for plasmapharesis to treat a 60-year-old woman admitted with a myasthenic crisis secondary to sepsis. A chest X-ray was arranged to check the position of the line and look for any complications, which revealed ...
Fattouch Khalil - - 2012
OBJECTIVE: The study of the mitral valve apparatus and its modifications during functional mitral regurgitation (FMR) is better revealed by 3-dimensional (3D) transesophageal echocardiography (TOE). To plan mitral valve repair by annuloplasty and papillary muscle (PPM) relocation, we proposed a valve repair procedure oriented by the new main features obtained ...
Smith Jason C - - 2012
BACKGROUND: The aim of this study was to investigate the accuracy of digital subtraction angiography (DSA), computed tomography angiography (CTA), and magnetic resonance angiography (MRA) in grading of carotid stenosis compared with actual measurement in an in vitro model. METHODS: Various grades of stenosis were created by adhering different amounts of ...
Sato Masayuki - - 2012
A 76-year-old female presented with a large upper basilar artery (BA) aneurysm causing obstructive hydrocephalus after coil embolization manifesting as diplopia. Magnetic resonance (MR) imaging and MR angiography showed a large BA top aneurysm. Coil embolization was performed. More than 6 months after the first coil embolization, the aneurysm had ...
Chang Rei-Yeuh - - 2012
We report this type A aortic dissection in both ascending and descending thoracic aorta presenting with new onset atrial fibrillation. CT images confirmed the final diagnosis. The mechanism may be due to compression of the left atrium by a large haematoma.
Lavan Amanda Hanora - - 2012
An 86-year-old lady presented to the accident and emergency department with a 90&emsp14;min history of receptive and expressive dysphasia. There were no motor symptoms or visual symptoms reported. A partial anterior circulation stroke was diagnosed. On examination, she had a National Institutes of Health Stroke Scale of 6. CT angiography ...
Nagasako Yuki - - 2012
A 76-year-old man presented with a two-month history of angina pectoris. Computed tomography (CT) revealed a serial enlargement of the supraclavicular and mediastinal lymph nodes compressing the heart, pulmonary artery and aorta. CT angiography (CTA) showed stenosis of the coronary arteries as a result of compression by the enlarged lymph ...
Nikolic Igor - - 2012
Intracranial aneurysm rupture is followed by high mortality and morbidity. In order to understand the aneurysm's natural course, it is necessary to recognize the predisposing factors for the rupture. MATERIAL and Analysis included 142 operated aneurysms (94 hemorrhaging and 48 unruptured) in the period from 2008 to 2010. The ratio ...
Del Nido Pedro J - - 2012
Congenital mitral valve stenosis is a heterogeneous group of lesions that can occur as an isolated defect or, more commonly, in association with other left heart obstructive defects. Age at presentation, presence and severity of pulmonary hypertension, and location of the primary obstructing lesion have been shown to be important ...
< 3 4 5 6 7 8 9 10 11 12 13 >