Search Results
Results 301 - 350 of 1918
< 2 3 4 5 6 7 8 9 10 11 12 >
Cebotari Serghei - - 2006
BACKGROUND: Tissue engineering (TE) of heart valves reseeded with autologous cells has been successfully performed in vitro. Here, we report our first clinical implantation of pulmonary heart valves (PV) engineered with autologous endothelial progenitor cells (EPCs) and the results of 3.5 years of follow-up. METHODS AND RESULTS: Human PV allografts ...
Reinhartz Olaf - - 2006
BACKGROUND: The use of a right ventricle to pulmonary artery (RV-PA) conduit in the Norwood procedure has been proposed to increase postoperative hemodynamic stability. A valve within the conduit should further decrease RV volume load. We report our clinical experience with this modification. METHODS AND RESULTS: From February 2002 through ...
Ali Ayyaz - - 2006
BACKGROUND: It is presumed that stentless aortic bioprostheses are hemodynamically superior to stented bioprostheses. A prospective randomized controlled trial was undertaken to compare stentless versus modern stented valves. METHODS AND RESULTS: Patients with severe aortic valve stenosis (n=161) undergoing aortic valve replacement (AVR) were randomized intraoperatively to receive either the ...
Lund Ole - - 2006
OBJECTIVE: Choice of a mechanical or biologic valve in aortic valve replacement remains controversial and rotates around different complications with different time-related incidence rates. Because serious complications will always "spill over" into mortality, our aim was to perform a meta-analysis on overall mortality after aortic valve replacement from series with ...
Schreiber Christian - - 2006
BACKGROUND: The quest for an alternative to homografts for reconstruction of the right ventricular outflow tract is ongoing. The Shelhigh No-React (NR-4000PA series) treated porcine pulmonic valve conduit (SPVC) was developed as a potential alternative. METHODS: During a 12-month period from May 2004 to May 2005, the SPVC was implanted ...
McMullan David Michael - - 2006
OBJECTIVE: Although homograft conduits are frequently used to establish right ventricle-to-pulmonary artery continuity, the limited availability of small-size homografts is a significant constraint in pediatric cardiac surgery. We compared the performance of standard homograft conduits with that of surgically reduced bicuspid homograft conduits in patients undergoing repair of truncus arteriosus. ...
Islam M N - - 2006
The morphometry of the intercommissural distances and their relation with other structures of the aortic valve of bovine heart was carried out. A total of 32 apparently healthy bovine hearts of indigenous cattle of both sexes (50% male and 50% female), 2-4 years of age, weighing 500 to 800 gms ...
Dua S - - 2006
Wider selection of young patients for prosthetic valve replacement for valvular heart disease has resulted in an increase in number of women with heart disease reaching childbearing age. Such patients presenting in labor for emergency cesarean section require special consideration. We present a report of a parturient who presented at ...
Linneweber J - - 2006
BACKGROUND AND AIM OF THE STUDY: The 3F equine aortic bioprosthesis is a new stentless valve which is currently undergoing evaluation in a multicenter clinical trial and is considered to have superior hemodynamic performance. Herein is reported the authors' initial experience with the 3F valve, focusing on the hemodynamic performance ...
Dewey Todd M - - 2006
BACKGROUND: Percutaneous aortic valve implantation has recently been performed in nonsurgical patients with severe aortic stenosis. Retrograde valve delivery has been problematic because of the size of the delivery system and concomitant peripheral vascular disease. We investigated a minimally invasive approach through the left ventricular apex for antegrade placement of ...
Medart Daniel - - 2006
BACKGROUND AND AIM OF THE STUDY: Currently, 95% of all implanted mechanical heart valve prostheses are constructed completely, or at least partially, from pyrolytic carbon. In order to develop a mechanical heart valve prosthesis made from alternative materials, a special hinge design was tested which enabled the integration of wear-resistant ...
Canosa Carlo - - 2006
Modified button technique for reattachment of coronary arteries in the aortic root replacement is reported. Anastomosis of the coronary buttons is performed from the inside of the composite valve graft previously including the coronary buttons in the composite valve graft. Reduced tension is present between coronary arteries and the composite ...
Kiernan Thomas J - - 2006
Coronary embolism as a cause of myocardial infarction is an uncommon but important entity both in terms of aetiology and treatment. Previous cases of coronary emboli in association with prosthetic mechanical valves have been reported previously but the mechanism of pharmacology and lack of patient awareness of medication importance is ...
El-Husseiny Moataz - - 2006
A best evidence topic in cardiac surgery was written according to a structured protocol. The question addressed was whether warfarin should be routinely prescribed for the first three months after a bioprosthetic valve replacement either for the aortic or mitral position. Altogether 620 papers were identified using the below-mentioned search. ...
Liu Yanran - - 2007
Polymer trileaflet valves offer natural hemodynamics with the potential for better durability than commercially available tissue valves. Strength and durability of polymer-based valves may be increased through fiber reinforcement. A finite element analysis of the mechanics of a statically loaded polymer trileaflet aortic heart valve has been conducted. A parametric ...
Braunlin Elizabeth A - - 2006
Mucopolysaccharidosis type I is a lethal autosomal recessive storage disease caused by a deficiency of lysosomal alpha-L-iduronidase and the consequent systemic accumulation of glycosaminoglycan. Cardiomyopathy and valvar insufficiency occur as glycosaminoglycan accumulates in the myocardium, expands the spongiosa of cardiac valves, and proliferates within the myointima of the epicardial coronary ...
Choi Eui-Young - - 2006
While valvular involvement of rheumatic heart disease can be easily detected with conventional echocardiography by evaluating morphologic change of the valve, it still remains problematic to determine whether there is myocardial fibrosis after rheumatic fever and if yes, how much extent it involves. This case demonstrated that contrast-enhanced magnetic resonance ...
Osman Faizel - - 2007
A 46-year old lady was under regular follow up for aortic valve replacement done in 2002 for aortic stenosis. The valve was a Carbomedics 19 mm bi-leaflet aortic valve prosthesis for which she had adequate anticoagulation since implantation. She had a past history of end stage renal failure, type 2 ...
Aoyagi Shigeaki - - 2006
We report four long-term survivors after valve replacement with a Starr-Edwards (S-E) mitral caged-disk valve. A model 6520 disk valve, size 3M, had been used in all of the four patients. Of the four patients, three underwent replacement of the disk valves 23, 24, and 26 years after mitral valve ...
Kottwitz Jack J - - 2006
A 4-yr-old male ferret (Mustela putorius furo) was presented with a 3-day history of pelvic limb ataxia and weakness. A cellulitis associated with a deep bite wound was identified and initially treated with antibiotics and anti-inflammatory medication. Two weeks later, a grade IV/VI cardiac murmur was identified on physical examination. ...
Pirundini Paul A - - 2006
Quadricuspid aortic valves are rarely encountered by the cardiac surgeon during aortic valve replacement. The most common location for the supranumerary cusp is between the noncoronary and the right coronary cusp, located over the membranous septum, which can potentially increase the risk of complete heart block after valve replacement. We ...
Karski Jacek M - - 2006
Transesophageal echocardiography provides unique diagnostic capabilities, allowing for a very precise look at the structure and hemodynamics of the human heart. It is minimally invasive and portable, and quickly diagnoses sudden hemodynamic changes in intensive care patients. It provides invaluable and precise information about myocardial dysfunction and intracardiac volume status. ...
Narine Kishan K - - 2006
We evaluated the hydrodynamic performance of kangaroo aortic valve matrices (KMs) (19, 21, and 23 mm), as potential scaffolds in tissue valve engineering using a pulsatile left heart model at low and high cardiac outputs (COs) and heart rates (HRs) of 60 and 90 beats/min. Data were measured in two ...
Grunkemeier Gary L - - 2006
OBJECTIVE: The St. Jude Medical Silzone heart valve had a silver-impregnated sewing ring designed to reduce the incidence of prosthetic valve endocarditis. Recruitment to the randomized AVERT study comparing Silzone valves with non-Silzone Control valves was stopped because of an increased risk of reoperation for paravalvular leak, but patient follow-up ...
Pawelec-Wojtalik MaƂgorzata - - 2006
OBJECTIVE: Despite the progress made in the development of valved stents for trans-apical valve replacement, a reliable closure of the access orifice remains a major issue. The present study was designed to evaluate if device closure of the ventricular wall is safe. MATERIALS AND METHODS: Transventricular access for pulmonary valve ...
Ikeda Kazuyuki - - 2006
OBJECTIVE: The optimal orientation of a bileaflet mechanical valve for tricuspid valve replacement (TVR) has not yet been determined. The aim of this study was to use fiberoptic cardioscopy to evaluate the effect of orientation of a mechanical valve implanted in the tricuspid position on bileaflet mechanical valve behavior. METHODS: ...
Nyboe Camilla - - 2006
OBJECTIVE: Mechanical heart valves can cause thromboembolic complications, possibly due to abnormal flow patterns that produce turbulence downstream of the valve. The objective of this study was to investigate whether three different bileaflet valve designs would exhibit clinically relevant differences in downstream turbulent stresses. METHODS: Three bileaflet mechanical heart valves ...
Vinh Donald C - - 2006
We report a case of definite Lactococcus garvieae native-valve endocarditis. The diagnosis was suspected in a patient presenting with congestive heart failure and found to have Enterococcus hirae bacteremia, with a history of L. garvieae bacteremia 1 month prior. Diagnosis was confirmed by 16S rRNA gene sequencing of the 2 ...
Babaliaros Vasilis - - 2006
Several advances have been made in interventional cardiology, particularly in the field of valvular heart disease. Among the procedures for which technologies are available, percutaneous replacement of the pulmonary and aortic valves, and percutaneous repair of the mitral valve, via annuloplasty or the Alfieri method, are the best known. Along ...
Toole J Matthew - - 2006
BACKGROUND AND AIM OF THE STUDY: Mechanical valves are used in dialysis patients due to the presumed rapid degeneration of tissue valves. The study aim was to compare the results of mechanical and tissue valves placed in renal dialysis patients. METHODS: Information obtained from a computer-based valve replacement database, telephone ...
Gerosa Gino - - 2006
BACKGROUND: In vivo comparison of the performance of heart valve prostheses is confounded by several factors, such as different nominal size, patients' characteristics and hemodynamics, surgical techniques, and study design. The aim of this study was to compare the in vitro hydrodynamic performances of 5 different tissue valves that would ...
Beholz Sven - - 2006
BACKGROUND AND AIM OF THE STUDY: Stentless aortic valve prostheses usually require two separate suture lines. The Freedom Solo valve (Sorin Group, Saluggia, Italy), by using a minimized implantation technique, requires only a single running suture line of 4-0 polypropylene. Herein are reported the surgical experience and early hemodynamic results ...
García-Bengochea José - - 2006
BACKGROUND AND AIM OF THE STUDY: The study aim was to evaluate the durability of the new Mitroflow 12A pericardial bioprosthesis and to assess ventricular mass regression after aortic valve replacement (AVR) in patients with small valves. METHODS: A total of 326 Mitroflow 12A pericardial bioprostheses was implanted without any ...
Roselli Eric E - - 2006
BACKGROUND AND AIM OF THE STUDY: Modes of failure of the Perimount bioprostheses have not been characterized. Thus, the study aim was to classify their failure modes, to compare their rates of occurrence, and to relate these to patient age. METHODS: Between September 1981 and July 1985, a total of ...
Pannu Harpreet K - - 2006
PURPOSE: To conduct a pilot study to determine the feasibility of evaluating aortic valve morphology and motion on electrocardiogram-gated 64-slice cardiac MDCT. METHODS: Four-dimensional images of the aortic valve were reviewed in 20 consecutive patients who underwent computed tomography (CT) coronary angiography. A consensus reading of 3 readers was performed ...
Attmann Tim - - 2006
BACKGROUND AND PURPOSE: Percutaneous heart valve replacement is an exciting growing field in cardiovascular medicine yet still with some major problems. Only sophisticated improvement of the instruments could make it a real alternative to conventional surgery. Therefore, the aim of this study was to evaluate different delivery devices for percutaneous ...
Tiete A R - - 2006
We report the early and late outcome following left-sided mechanical heart valve replacement in children. Between 10/1981 and 02/2001, 27 children (13 male, mean age 7.2 +/- 5.2 years, range 0.53-15.7 years) underwent mechanical mitral (MVR 16), aortic (AVR 9) or double valve replacement (DVR 2) with St. Jude Medical ...
Lincoln Joy - - 2006
The mature heart valves are dynamic structures composed of highly organized cell lineages and extracellular matrices. The discrete architecture of connective tissue within valve leaflets and supporting structures allows the valve to withstand life-long functional demands and changes in hemodynamic forces and load. The dysregulation of ECM organization is a ...
Walther Thomas - - 2006
OBJECTIVE: Percutaneous aortic valve implantation has been performed in patients with severe aortic stenosis judged as nonsurgical candidates. We evaluated a facilitated transapical antegrade approach for potential use in surgical high-risk patients. METHODS: A pericardial xenograft fixed within a 23-mm stent (Cribier-Edwards aortic prosthesis, Edwards Inc., Irvine, CA, USA) was ...
Rivera-Feliciano José - - 2006
A hallmark of heart-valve development is the swelling and deposition of extracellular matrix in the heart-valve region. Only myocardium overlying this region can signal to underlying endothelium and cause it to lose cell-cell contacts, delaminate, and invade the extracellular space abutting myocardium and endocardium to form endocardial cushions (EC) in ...
Herbertson Luke H - - 2006
Cavitation is known to cause blood element damage and may introduce gaseous emboli into the cerebral circulation, increasing the patient's risk of stroke. Discovering methods to reduce the intensity of cavitation induced by mechanical heart valves (MHVs) has long been an area of interest. A novel approach for analyzing MHV ...
Josa Miguel - - 2006
BACKGROUND: Normal functioning mechanical heart valve prostheses are designed to have a certain degree of intrinsic structural regurgitation as a washout mechanism to avoid prosthetic thrombosis. However, intrinsic regurgitation leads to blood cell trauma and hemolysis. Information on hemolysis associated with mechanical bileaflet prostheses is scarce. This study evaluated factors ...
Imren Yildirim - - 2006
We report a case involving a surgical sponge retained following an aortic valve replacement. The surgical sponge was placed into the left ventricle to protect calcified debris from falling down into the left ventricular cavity. However, the sponge was forgotten and left inside the patient. We identified the retained surgical ...
Suttie S A - - 2006
AIM: The goal of aortic valve replacement (AVR) surgery in the elderly (= or >75 years) is to extend survival and minimize valve-related morbidity, mortality and reoperation. As the elderly population lives longer, those with implanted valves are at risk of suffering valve related complications. We hypothesize that bioprostheses are ...
Burstow Darryl J - - 2006
A 52-year-old male with idiopathic hypereosinophilic syndrome (HES) was transferred to our institution following the development of acute respiratory failure and shock. He had previously undergone tricuspid valve replacement with bioprosthetic valves on two occasions: the initial surgery for severe native tricuspid valve stenosis and the redo surgery for severe ...
Bhatti F - - 2006
OBJECTIVES: To study the ability of the logistic EuroSCORE to predict operative risk in contemporary cardiac surgery. DESIGN: Retrospective analysis of prospectively collected data. SETTING: All National Health Service centres undertaking adult cardiac surgery in northwest England. PATIENTS: All patients undergoing cardiac surgery between April 2002 and March 2004. MAIN ...
Odim Jonah - - 2006
OBJECTIVE: Since a functional right ventricle is desirable when repairing pulmonary atresia with intact ventricular septum, we sought to determine the factors that portend a successful biventricular repair in these children. METHODS: A review of operative records at UCLA between 1982 and 2001 revealed 56 patients diagnosed with pulmonary atresia ...
Zhai Wanyin - - 2006
Heart valve diseases have a significant high mortality, and the valve replacement using glutaraldehyde crosslinked porcine heart valves is one of the main curing techniques. But its application is limited due to poor durability, calcification of the valves and immunogenic reactions. The aim of this study was to evaluate the ...
Butany Jagdish W - - 2006
Valvular heart disease has numerous etiologies. These range from congenital malformations to infectious and degenerative diseases. Clinically, these result in significant problems, the management of which can necessitate valve replacement with prosthetic heart valves. A rare cause is the deposition of foreign material in the valvular tissues, and these include ...
Elahi Maqsood - - 2006
BACKGROUND: Long-standing aortic stenosis (AS) causes significant progressive left ventricular dysfunction and may result in subendocardial ischaemia and conduction disorders. Though stentless bioprosthesis show better haemodynamic profiles compared with stented, yet debate exists about the differential effects of valve substitutes on the incidence of permanent pacemaker (PPM) implantation following aortic ...
< 2 3 4 5 6 7 8 9 10 11 12 >