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Results 101 - 150 of 1928
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Laske Tim T Medtronic, Inc., Moundsview, MN 55112, USA. - - 2009
Although the heart valve market is relatively mature, many patients currently indicated for valve repair or replacement are either undiagnosed, not referred for surgery, or are too sick/unwilling to undergo the required surgery (Table I). To address this unmet clinical need, the medical device industry has undertaken the development of ...
Colacioppo-Saavedra Ricardo - - 2008
BACKGROUND: Heart valve surgery is the second most common type of cardiac surgery. However, there is limited information about the outcomes associated to these types of surgeries. METHODS: A retrospective review was performed in 91 Puerto Rican patients who underwent elective heart valve replacement surgery at the Cardiovascular Center of ...
Ikee Ryota - - 2008
Heart valve calcification is an important predictor for all-cause and cardiovascular mortality in hemodialysis patients. Recently, serum beta(2)-microglobulin has been associated with cardiovascular disease in the non-hemodialysis population, but the relationship between serum beta(2)-microglobulin and valve calcification remains unknown. In this cross-sectional study, we recorded the patients' clinical parameters, including ...
Sharma Shikha - - 2009
Current guidelines necessitate varying degrees of long-term anticoagulation in patients with mechanical heart valve(s) to prevent thrombotic and embolic complications. We describe a patient with a functioning aortic mechanical valve without anticoagulation for 23 years. A 68-year-old man had an aortic valve (St Jude Medical) replacement in 1984. His native ...
Villemot Jean-Pierre - - 2008
BACKGROUND AND AIM OF THE STUDY: The study aim was to update the authors' experience with aortic valve replacement (AVR) using the ATS mechanical prosthesis in terms of early and long-term outcome in routine practice. METHODS: This retrospective analysis was extracted from clinical data available between April 1996 and February ...
Reinsch Nico - - 2008
Infective endocarditis (IE) due to Gram-negative bacteria is a rare occurrence, with a relative frequency of less than 10% compared to that caused by Gram-positive bacteria. Herein is presented the fatal case of a 66-year-old man who had undergone mechanical aortic valve replacement 10 years previously, and developed aortic valve ...
Ree Ronald M - - 2008
PURPOSE: To describe both the evolution and the main associated complications in the anesthetic management of the initial 40 patients at our centre who underwent percutaneous retrograde aortic valve replacement, a novel technique utilizing a catheter-guided femoral artery approach. CLINICAL FEATURES: With institutional Research Ethics Board approval, we retrospectively reviewed ...
Sakhaeimanesh A A - - 2008
The effect of oscillation on elevating turbulent shear stresses through the Jellyfish and St. Vincent valves has been investigated. Laser Doppler anemometry was employed to determine the velocity and shear stress distributions at various locations downstream of the valves. Comparison between two valves revealed that at 0.5D downstream of the ...
Laksman Zachary - - 2008
Bioprosthetic valves are generally considered to carry a low risk of valve thrombosis, obviating the need for long-term anticoagulation in most patients. Few reports exist of the diagnostic characteristics and management of bioprosthetic valve thrombosis. Herein is presented a case of critical bioprosthetic mitral valve thrombosis in which successful clinical ...
Yébenes J C - - 2008
Needleless valve connectors were introduced to avoid needlestick injuries in healthcare workers but some concerns exist about their microbiological safety. A randomised controlled trial was performed to assess hub colonisation affecting positive-pressure valve connectors (PPVCs) compared to conventional caps used for radial arterial catheters inserted into critically ill patients. Patients ...
Rodriguez Rosendo A RA Division of Cardiac Surgery, Department of Surgery, University of Ottawa Heart Institute, Ottawa, Ontario K1Y 4W7, - - 2009
The difficulty of distinguishing solid from air emboli using transcranial Doppler has limited its use in situations where both types of emboli can occur, such as in mechanical heart valve patients. To make transcranial Doppler clinically useful, a method must be found to distinguish benign air bubbles from the more ...
Krakow E F - - 2009
Cardiac surgery for coronary heart disease, and for calcific and degenerative valvular heart disease, will likely become more frequent with an ageing haemophilia population. Our report describes the successful management of an individual with mild haemophilia B undergoing elective aortic valve replacement using a continuous infusion of recombinant factor IX. ...
Herbertson Luke H - - 2008
The closing behavior of mechanical heart valves is dependent on the design of the valve and its housing, the valve composition, and the environment in which the valve is placed. One innovative approach for improving the closure dynamics of tilting disk valves is introduced here. We transformed a normal Delrin ...
Mertsching H - - 2008
Cardiovascular tissue engineering is a fast evolving field of biomedical science and technology to manufacture viable blood vessels, heart valves, myocardial substitutes and vascularised complex tissues. In consideration of the specific role of the haemodynamics of human circulation, bioreactors are a fundamental of this field. The development of perfusion bioreactor ...
Asopa Sanjay - - 2009
Heart lesions in patients with rheumatoid arthritis (RA) are well documented in literature; however, in the majority of cases these are incidental findings at postmortem. Most patients do not require cardiac surgical intervention unless they develop complications such as significant valvular regurgitation. Patients with RA often require orthopedic operations and ...
Katayama Susumu - - 2008
OBJECTIVE: Recently, various modifications have been made to aortic root replacement procedures to include the pseudosinus in the synthetic graft, but its effect on valve function still remains to be elucidated. The purpose of this study was to compare the flow dynamics and its influence on the stress/strain in the ...
He Guo-Wei - - 2008
OBJECTIVES: In older children (>four years) and adults the strategy of repair of tetralogy of Fallot (TOF) should have a low rate of transannular patch to avoid pulmonary insufficiency (PI), and in addition, we developed a new method of reconstruction of the right ventricular outflow tract (RVOT) to reduce PI. ...
Luciani Giovanni Battista - - 2008
To define risk and outcome of surgery in adults with congenital valve disease (CVD), experience between 2002 and 2005 with 371 CVD operations (288 males, aged 56 +/- 9 years) was compared with 2102 for acquired valve disease (AVD) (69 +/- 22 years, p = 0.02). Diagnosis included: bicuspid aortic ...
Nowicki Edward R - - 2008
BACKGROUND: Aortic valve allograft reoperation is a challenge for the surgeon and a risk to the patient. We examined our experience to identify these challenges and risks. METHODS: From April 1987 to January 2006, 130 patients underwent first-time allograft-related reoperations. Prior implant was subcoronary 32 (25%), inclusion-root 28 (22%), and ...
Yébenes Juan Carlos - - 2008
OBJECTIVE: Disinfectable needle-free closed connectors were designed to avoid needle-stick injuries and to be easily disinfected before handling. Workloads or lack of knowledge, however, could impede the correct handling of these devices, allowing endoluminal catheter colonization. The aim of our study was to assess the barrier effect of different disinfectable ...
Payne Darrin M - - 2008
BACKGROUND: Several trials have compared stentless with stented valves following aortic valve replacement (AVR). The goal of this review was to systematically locate, critically appraise, and quantitatively combine results to determine if stentless valves improve cardiac hemodynamics. METHODS: We performed an unrestricted search of Pubmed Medline, EMBASE, CINAHL, the Cochrane ...
Horiguchi Masahide - - 2008
A 63-year-old woman who had undergone aortic valve replacement (AVR) with a 22-mm Medtronic Hall valve in May 1994 was admitted to the authors' hospital in June 2006 with epigastric pain and nausea. She presented with sudden precipitous deterioration of hemodynamics under high-dose catecholamines, but this improved in ca. 10 ...
O'Rullian James J - - 2008
A 71-year-old high-risk fourth-time redo male patient was diagnosed with prosthetic valve endocarditis of both aortic and mitral valves, and subsequently required a re-operative aortic and mitral valve replacement. He was placed on cardiopulmonary bypass (CPB) and arrested with normothermic hyperkalemic all-blood cardioplegia (microplegia) containing adjunctive adenosine-lidocaine-magnesium (adenocaine); aerobic arrest ...
Minami Hiroya - - 2008
An 80-year-old woman had undergone initial mitral valve replacement using a Björk-Shiley mechanical valve owing to mitral stenosis 25 years earlier. Suddenly, she had anemia and an increased lactic dehydrogenase (LDH) level. Transesophageal echography (TEE) showed perivalvular leakage. In a redo operation, two side-by-side stitches of the valve on the ...
Scharfschwerdt Michael - - 2008
In this study, we report on our first experience with the construction of a valve using autologous vena cava tissue for right ventricular outflow tract reconstruction. Simulating the clinical situation valves were built from tubular pieces of porcine inferior vena cava placed in a PTFE tube and investigated in a ...
Khair Tarif - - 2010
Primary cardiac tumors are very rare. Cardiac Papillary Fibroelastoma (CPF) is the third most common primary tumor of the heart and most commonly affects cardiac valves. Those tumors appear like a "sea anemone" with multiple papillary fronds attached to the endocardium by a short stalk. It generally occurs as a ...
Bochenek-Klimczyk Krystyna - - 2008
Here we report the early clinical results of a new preassembled stentless valved-conduit incorporating artificial sinuses of Valsalva (BioValsalva). This new composite conduit incorporates a stentless porcine aortic valve (Elan, Vascutek Terumo, UK) suspended within a triple-layered vascular conduit (Triplex, Vascutek Terumo, UK) constructed with sinuses of Valsalva. Between December ...
Chambers John B - - 2008
OBJECTIVE: A stented bovine pericardial valve might be less obstructive than a stented porcine valve. This study compared early hemodynamic function in a prospective series of 99 patients randomized to receive either a Mosaic or Perimount replacement aortic valve. METHODS: Echocardiography was performed early after surgery and at 1 year ...
Anderson Sara E - - 2008
PURPOSE: The purpose of this study was to quantify and characterize venous valves within the major left ventricular (LV) veins of human hearts. METHODS: Fiberscope cameras were inserted into the coronary sinus and were manipulated to major LV coronary veins of perfusion fixed human hearts (n = 26). Observed venous ...
Jeppson Peter C - - 2008
BACKGROUND: Bacterial endocarditis is a potentially life-threatening disease associated with significant morbidity and mortality. It is estimated that one patient per 1 million will develop endocarditis after elective abortion. CASE: A young woman with no history of cardiac defects developed acute bacterial endocarditis after elective abortion performed without appropriately timed ...
Germing A - - 2008
AIM: Aortic valve replacement is a standard procedure for the treatment of severe aortic valve stenosis. Due to lower flow velocities stentless valves are associated with a more effective regression of left ventricular hypertrophy in comparison to stented valves. However, mismatch between body surface area and valve size supports unfavourable ...
Burkert J - - 2008
OBJECTIVE: Allograft heart valves (AHV), biological valves of human origin, offer potential advantages over conventional xenografts in terms of superior hemodynamics and, perhaps, better durability. The most important factors for long-term AHV clinical performance are the processing and cryopreservation methods. The aim of this study was to evaluate the impact ...
Liao Kenneth K - - 2008
BACKGROUND: Mechanical stress is one of the contributing factors for bioprosthetic calcification. A HeartMate XVE (Thoratec, CA) left ventricular assist device (LVAD) has two identical porcine valves, one for inflow and the other for outflow. The inflow valve endures a higher closing pressure than the outflow valve; thus, an implanted ...
Song Min-Ho - - 2008
A simple method of checking for bleeding from the proximal anastomosis site in Bentall operations is described. After suturing a Carbo-Seal prosthesis to the aortic annulus, using a folding-over technique, the left ventricle is filled with cardioplegic solution through the prosthetic valve, and the heart is massaged to visualize possible ...
Desai Sapna - - 2008
Prosthetic valve thrombosis is a dangerous and unfortunately not uncommon medical situation, often seen as a medical emergency. Patients with previously unseen and more confounding medical problems are presenting, making the decision regarding therapeutic options even more complicated. In this case report, we describe a complicated patient with mechanical mitral ...
Ballert John A - - 2008
The development of nasal obstruction after rhinoplasty is associated with significant patient dissatisfaction. Correction of nasal obstruction requires a thorough evaluation to determine the ANATOMIC EPICENTER of obstruction. The offending structure can usually be traced to abnormalities in the internal nasal valve, intervalve area, or the external nasal valve and ...
Moura Luis M LM Oporto School of Medicine, Department of Medicine, Portugal. - - 2008
Valvular heart disease (VHD) is characterized by an ongoing, inflammatory cellular response which results in a left ventricular hemodynamic stress change in response to valvulopathy. The current inflammatory hypothesis suggests that as the heart valve disease progresses the inflammatory cytokine response is activated causing continuation of deleterious effects on the ...
Remme Espen W - - 2008
BACKGROUND: Normal left ventricular myocardium demonstrates distinct spikes in the velocity trace before and after left ventricular ejection. We tested the hypothesis that the preejection and postejection velocity spikes reflect early systolic shortening and late systolic lengthening that are interrupted by mitral and aortic valve closure, respectively. METHODS AND RESULTS: ...
Varghese George M - - 2008
Fungal endocarditis (FE) is an increasingly prevalent and devastating disease in today's highly advancing medical practice. With more patients receiving broad-spectrum antibiotics or invasive interventions including long-term central venous catheters or prosthetic heart valve placements, FE is increasingly reported. Recognizing FE early can be difficult, because it often lacks some ...
Accola Kevin D - - 2008
BACKGROUND AND AIM OF THE STUDY: Aortic valve dysfunction is the most common form of valvular heart disease. As the population continues to age, a greater number of patients will become candidates for aortic valve replacement (AVR); hence, prosthetic valve choice becomes of paramount importance. METHODS: A retrospective analysis was ...
Silberman Shuli - - 2008
BACKGROUND: The choice between a mechanical or bioprosthetic valve replacement device is not always clear, although patient age is most often the determining factor. We reviewed our experience with patients undergoing aortic valve replacement (AVR) in order to assess and compare long-term outcomes between patients receiving a mechanical valve and ...
Suijker Monique - - 2008
To review our experience with cardiac surgery due to remnants of the sinus venosus valve. We performed a retrospective evaluation of patients records during the period from 1980 to 2007. Three patients underwent surgical removal of the redundancy of the right sinus venosus valve. Remnants of the embryologic sinus venosus ...
Gustafsson B I - - 2008
The carcinoid syndrome is usually evident when enterochromaffin (EC) cell-derived neuroendocrine tumors (carcinoids) metastasize to the liver. In addition to carcinoid symptomatology, about 40% of patients exhibit carcinoid heart disease (CHD) with fibrotic endocardial plaques and associated heart valve dysfunction. The mechanism behind CHD development is not fully understood, but ...
Yoda Masataka - - 2008
Bartonella (Rochalimaea) species are increasingly recognized as a cause of endocarditis, but the total number of cases remains low. Especially, Bartonella quintana endocarditis is very rare and there have been no reports in Japan. A 66-year-old man was hospitalized because of dyspnea and fever. An echocardiogram showed severe mitral valve ...
Welsh John Patrick - - 2008
An 88-year-old Caucasian man of Italian ancestry came into our clinic with multiple, painful purple-red "growths" on his left foot that he'd had for several years. The patient had no systemic complaints (no fever, chills, weight loss, night sweats). He had a history of hypertension, a cardiac valve replacement, and ...
Meineri Massimiliano - - 2008
PURPOSE: Trans-catheter Aortic Valve Implantation (T-C AVR) has been offered, on a compassionate basis, to patients with symptomatic aortic valve (AV) stenosis deemed to be too high risk for surgery[1,2]. The procedure consists of two steps: an AV balloon valvuloplasty, followed by the deployment of a pericardial bioprosthesis. Both steps ...
Akins Cary W - - 2008
Energy loss is a well-established engineering concept that when applied to evaluating the performance of native heart valves and valvular prostheses has the potential for providing valuable information about the impact of valve function on myocardial performance. The concept has been understood for many years, but its routine application has ...
Sakamoto Takahiko - - 2008
OBJECTIVE: The current study aims to evaluate the long-term outcomes of the Konno procedure. METHODS: The clinical records of 63 patients who had undergone the Konno procedure between February 1984 and March 2007 were reviewed. During this period, the Ross procedure was introduced in 1996. Of the 63 patients, 38 ...
Ustunsoy Hasim - - 2008
In congenital heart surgery, especially after Tetralogy of Fallot (TOF), problems from the right ventricular outflow tract may lead to serious complications as morbidity and mortality. To resolve these problems by reoperating using cardiopulmonary bypass (CPB) with valves or conduits is affecting surgical morbidity and mortality rates. The ability of ...
Berry Colin - - 2008
Percutaneous aortic valve replacement (PAVR) is an emerging therapy for nonsurgical patients with severe aortic stenosis (AS). We examined the role of transesophageal echocardiography (TEE) in PAVR. TEE was used initially to assess the native valve and aortic root, and served as a guide during PAVR. Following prosthetic valve deployment, ...
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