Search Results
Results 451 - 500 of 899
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Wang Andrew - - 2003
BACKGROUND AND AIM OF THE STUDY: The pulmonary autograft, or Ross procedure, has theoretical hemodynamic benefits over other aortic valve replacements. The hemodynamic performance of the pulmonary autograft and pulmonary homograft components of this procedure have not been well defined. METHODS: Twenty patients with pulmonary autograft replacement of the aortic ...
Martin T C - - 2003
A young woman with aortic valve insufficiency secondary to rheumatic heart disease underwent replacement of her diseased aortic valve with her own pulmonary valve and replacement of her pulmonary valve with an aortic cadaver homograft, the Ross procedure. She went on to conceive and deliver a normal infant. The Ross ...
Kollar Andras - - 2003
The case described is of a 7-year-old boy with recurrent long-segment left ventricular outflow tract obstruction. Due to previous pulmonary artery band stenosis and subsequent repair with a prosthetic patch, the pulmonary root was not intact. In this complicated Ross-Konno operation, the prosthetic patch was replaced with autologous tissue and ...
Mahesh B - - 2003
Fungal prosthetic valve endocarditis is an uncommon but serious condition with high early and long-term mortality. The majority of these cases occur after aortic valve surgery and are caused by Candida species. Radical debridement of all infected tissues, valve replacement with perioperative and long-term anti-fungal agents is the recommended treatment. ...
Ortu Paolo - - 2003
A 37-year-old male with acute complicated methicillin-sensitive Staphylococcus aureus mitral valve endocarditis underwent urgent valve replacement with a bileaflet prosthesis. The postoperative course was complicated with fever and heart failure. Echocardiography showed a large subannular false aneurysm of the left ventricle. Three weeks later resection and closure of the defect ...
Dohmen P M - - 2003
We report the case of a 29-year-old male Jehovah's Witness who presented with hemolysis and right heart failure as a consequence of extreme calcification of an aortic valve-containing allograft and Dacron prosthesis that had been placed 22 years earlier to repair tetralogy of Fallot. Reoperation had been denied by several ...
Sievers H-H - - 2003
INTRODUCTION: Cryopreserved homograft valve conduits have been used to reconstruct the right and left ventricular outflow tract. Long-term studies have shown homograft degeneration and calcification, and it has been postulated that immunological mediated phenomena in a manner similar to that seen in chronic rejection may contribute to the degeneration process. ...
Chatzis Andrew C - - 2003
BACKGROUND: The well-known flaws of existing valved conduits for reconstruction of the right ventricular outflow tract (RVOT) continue to stimulate research for the elusive "perfect" conduit. In this study, we describe our experience with a glutaraldehyde-treated bovine jugular vein valved conduit (Contegra). METHODS: 55 years underwent implantation of a Contegra ...
Boudjemline Younes - - 2003
A case of aneurysm of the right ventricular outflow tract is described after repair of tetralogy of Fallot using a Contegra supported conduit. Angiograms revealed that the aneurysm was located between the ventricular anastomosis and the proximal ring of the conduit confirming echocardiographic data. Because the conduit between the rings ...
LeMaire Scott A - - 2002
BACKGROUND: The purpose of this study was to examine our experience with proximal aortic reoperations in patients with composite valve grafts (CVGs) and assess postoperative survival and morbidity. METHODS: Since 1991, 33 patients with CVGs underwent reoperation for one or more of the following indications: aneurysms distal to the CVG ...
Northrup William F WF - - 2002
BACKGROUND AND AIM OF THE STUDY: Trends in aortic valve operations (AVO) may help to predict the future of aortic valve surgery in the context of changing case mix, population demographics, emerging technology and shifting paradigms. METHODS: All adults undergoing single AVO between 1979 and 1999 were reviewed retrospectively according ...
Koolbergen Dave R - - 2002
OBJECTIVES: The limited availability of donor valves and experimental evidence that pulmonary valves can withstand systemic pressure made us use cryopreserved pulmonary homografts as aortic valve substitutes. We observed a high incidence of early reoperation because of severe graft insufficiency due to cuspal tears. The mid-term results are evaluated in ...
Lytle Bruce W - - 2002
BACKGROUND: Prosthetic aortic valve endocarditis (PVE) is an important complication of aortic valve replacement (AVR) and is a particularly difficult situation after an operation combining AVR with ascending aortic replacement. METHODS: From 1988 through 2000, 27 patients with aortic valve PVE after previous ascending aortic replacement (aortic root replacement in ...
Hata Hiroaki - - 2002
We contrived a surgical technique for the purpose of improving recent results. From April 1998 to June 2001, 24 patients (aged 60 to 81 years, mean age 71.0 +/- 4.8 years; 11 men, 13 women) underwent replacement of the aortic root and the ascending aorta electively using a Freestyle stentless ...
Laforest Isabelle - - 2002
BACKGROUND: The Ross procedure and aortic homografts have both been shown to have superior hemodynamic performance after valve replacement, but there have been few comparisons. METHODS: Sequential Doppler echocardiograms were performed up to 5 years after aortic valve replacement in 132 patients with the Ross procedure and 111 patients with ...
Schmid Franz X - - 2002
BACKGROUND: Shortage of homografts prompted us to replace the transplanted pulmonary trunk with stentless xenografts during the Ross procedure. The 5-year follow-up in comparison with pulmonary homografts is presented. METHODS: From April 1997 to March 2002, of 51 patients undergoing a modified Ross procedure 15 patients (age range 55 to ...
Attanawanich Sukasom - - 2002
Absent pulmonary valve syndrome in a 4-month-old infant was successfully corrected using a fresh autologous pericardial trileaflet valved conduit. He recovered from operation with only mild pulmonary regurgitation at 4 months postoperatively. This technique is an effective alternative for infants with congenital heart disease who need tissue valved conduits. It ...
Kastrup Marc - - 2002
A 26-year-old man with osteogenesis imperfecta and severe aortic regurgitation was scheduled for aortic valve replacement. As previously described by other authors the operation was difficult owing to the friability and weakness of the tissues. Mean blood losses of 153 mL per hour during the first 7 postoperative hours were ...
Allen Bradley S - - 2002
BACKGROUND: There is still no perfect conduit for reconstruction of the right ventricular outflow tract (RVOT) in children. Homografts are not always available in the appropriate size, and degenerate in a few years. This study evaluates the pericardial valve with Gore-Tex conduit as an alternative for RVOT construction. METHODS: From ...
Bashar Abul Hasan Muhammad - - 2002
Prosthetic valve endocarditis is a relatively rare condition associated with high mortality. Endocarditis affecting 2 successive mechanical valves at the aortic position has not, to the best of our knowledge, been described. We reported such a patient whose condition was further complicated by mitral regurgitation, pulmonary hypertension, worsening heart failure, ...
Carrel Thierry - - 2002
BACKGROUND AND AIMS OF THE STUDY: Current techniques to correct valvular anomalies of the right ventricular outflow tract (RVOT) include repair and replacement of the pulmonary valve. However, the performance of currently used conduits has been less than ideal because of unfavorable hemodynamics and mid- to long-term complications. An early ...
Wells Winfield J - - 2002
OBJECTIVE: It has been assumed that the need for homograft replacement is due to somatic outgrowth, but this has not been adequately studied. Our objective was to identify reasons for homograft conduit failure. METHODS: The records and imaging studies of 40 patients undergoing homograft conduit replacement of the right ventricular ...
Javadpour H - - 2002
OBJECTIVE: Homograft valved conduits are used in the reconstruction of right ventricular outflow tract (RVOT), and calcification is a recognised phenomenon in these devices. The purpose of this study was to assess the effect of type (pulmonary and aortic) and mode of harvest of these cryopreserved homografts (cadaveric and beating ...
Imanaka Kazuhito - - 2002
A 45-year-old diabetic woman was subjected to percutaneous cardiopulmonary support for a life-threatening pulmonary embolism. One month later, she developed isolated pulmonic valve endocarditis. The causative organism was methicillin-resistant Staphylococcus aureus. Because of the uncontrollable infection and residual pulmonary hypertension, she underwent pulmonary artery root replacement with a cryopreserved pulmonary ...
Chang Jen-Ping - - 2002
Aortic root replacement with pulmonary autograft (Ross procedure) is a valuable technique. However, the best material for right ventricular outflow tract reconstruction remains controversial. We report on the experience with use of an aortic autograft with reimplantation of the diseased aortic valve for right ventricular outflow tract reconstruction in 3 ...
Kanter Kirk R - - 2002
BACKGROUND: Surgical repair of obstructive lesions of the right ventricular outflow tract (RVOT) in children commonly creates pulmonary valve incompetence that may eventually require pulmonary valve replacement (PVR). We reviewed our experience with PVR late after RVOT reconstruction. METHODS: We performed 100 PVRs in 93 children 1.1 months to 22.4 ...
Morishita Atsushi - - 2002
We evaluated 4 patients who had undergone previous cardiac surgery underwent reoperation involving aortic root replacement. Subjects were a 55-year-old man who had undergone separate valve graft replacement for a dissecting aneurysm (DeBakey type I) 3.25 years earlier; a 51-year-old woman who had undergone separate valve graft replacement for a ...
Bonhoeffer Philipp - - 2002
OBJECTIVES: We report our experience of percutaneous valve insertion in pulmonary position in humans. BACKGROUND: Over the past 40 years, prosthetic conduits have been developed to surgically establish continuity between the right ventricle and the pulmonary artery. However, stenosis and insufficiency of the conduit due to valvular degeneration or panus ...
Hüttl Tivadar - - 2002
Since the first successful repair of aortic coarctation by Dr Clarence Crafoord in 1945, there are few data regarding late follow-up of homografts in this position. Between 1957 and 1959, 7 patients underwent surgical correction of aortic coarctation by Professor József Kudász at the Department of Cardiovascular Surgery, Semmelweis University, ...
Yokose Shogo - - 2002
The influence of preservation techniques on xenogeneic immune responses was examined to investigate the possibility of their clinical use. Mongrel dogs and pigs were used as allogeneic and discordant xenogeneic donors of aortic valve grafts, respectively. The allografts and xenografts were implanted in the abdominal aorta of mongrel dogs after ...
Ray Ruma - - 2002
BACKGROUND: Homograft mitral valve replacement is an alternative therapeutic approach to prosthetic or bioprosthetic valve replacement. The present paper documents the pathological changes of explanted homograft mitral valve. METHODS: We examined six explanted homograft mitral valves, which were taken out 6 weeks to 60 months following valve replacement procedure. Gross ...
Reichardt Peter - - 2002
In an 11-year old boy with Crohn disease, long-term therapy with prednisolone was decided to be augmented by infliximab, a monoclonal antibody to tumour necrosis factor alpha. The patient, who was in a stable clinical condition with low signs of inflammation at that time, deteriorated 3 days after the first ...
Westaby Stephen - - 2002
OBJECTIVE: Atheromatous ascending aortic aneurysms (AAA) frequently present with aortic regurgitation (AR) from dilatation of the sino-tubular junction (STJ) and extension of the pathological process into the root. Experience suggests that root dilatation begins in the non-coronary, then right coronary sinus. Rather than employ aortic root replacement or the David ...
Harada Hideyuki - - 2002
A 50-year-old man developed thrombosis in the valve of a Björk-Shiley prosthesis that had been used for composite graft replacement of the aortic valve and ascending aorta 8 years previously. The thrombosed valve was removed, and because of the narrow aortic valve ring, it was replaced using patch enlargement of ...
Corno Antonio F - - 2002
BACKGROUND AND AIMS OF THE STUDY: The reduced availability of homografts and investigations into the ideal valved conduit have prompted a search for alternative options. This prospective study evaluated the Contegra, a new biological valved conduit consisting of a glutaraldehyde-preserved heterologous bovine jugular vein having a trileaflet venous valve. METHODS: ...
Okazaki Yukio - - 2002
BACKGROUND AND AIMS OF THE STUDY: Although the Ross procedure has recently been recognized as one of the best replacements of the aortic valve, regurgitation has occasionally been observed with dilatation of the sinotubular junction (STJ) and/or basal ring (BR). This study was designed to evaluate the native distensibility of ...
Burgess Lesley J - - 2002
STUDY OBJECTIVES: To determine the biochemical characteristics of large pericardial effusions in various disease states, and to assess their utility as diagnostic tools. SETTING: An academic university hospital in the Western Cape, South Africa. DESIGN: Consecutive, prospective case series. PATIENTS: One hundred ten hospital patients > 12 years old, who ...
Tsai Kuei-Ton - - 2002
Prosthetic aortic valve replacement for aortic valve endocarditis remains a primary practice of most cardiac surgeons. Usually it cures endocarditis and restores cardiac function. However, in advanced aortic valve endocarditis with complex annular destruction, complications following prosthetic aortic valve replacement do occur and present a formidable challenge for reoperation. Herein, ...
Anyanwu Ani C - - 2002
BACKGROUND: This study was undertaken to ascertain whether mortality data in the cardiac surgical literature mirror data reported in national databases. METHODS: This was a review of articles with 50 or more subjects reporting single-center mortality data for coronary artery bypass or aortic or mitral valve replacement published in the ...
Melina Giovanni - - 2002
BACKGROUND AND AIM OF THE STUDY: Unstented bioprostheses offer better hemodynamics after aortic valve replacement. It has been reported recently that subcoronary implantation of the Freestyle valve may result in increased transvalvular velocities. In a prospective randomized trial, transvalvular velocities were investigated after implantation of a homograft or a Medtronic ...
David T E - - 2002
OBJECTIVE: To review the experience with reoperations on the aortic valve combined with replacement of the ascending aorta. PATIENTS AND METHODS: From 1991 to 2000, 237 patients underwent reoperations on the aortic valve combined with replacement of the ascending aorta. The study consisted of 188 men and 49 women, with ...
Wendler O - - 2001
BACKGROUND: In aortic valve replacement stentless bioprostheses results in improved hemodynamic function compared to stented valves. Using the root replacement technique even larger prostheses are implantable. We present our experience with stentless bioprostheses implanted in the "full-root" technique. PATIENTS AND METHODS: Between 01/1997 and 12/2000, 149 patients underwent root replacement ...
Sinzobahamvya N - - 2001
BACKGROUND: Limited durability is expected for small homograft valves that are used to correct congenital cardiac disease. METHODS: All 76 homograft valves with an internal annulus diameter ranging from 8 to 13 mm that were implanted from 1987 through 2000 in the pulmonary position were retrospectively analyzed. In each case, ...
Yoshizumi K - - 2001
We report our experience of aortic valvar replacement subsequent to the arterial switch procedure, incorporating the Lecompte maneuver, in patients with complete transposition. The anterior wall of the neoaorta was incised in continuity with the posterior wall of the pulmonary trunk. The aortic root was reconstructed with or without augmentation ...
Doty D B - - 2001
The purpose of this study was to review the results of mitral and tricuspid valve replacement with mitral valve homograft. Twenty-two mitral homografts were used to replace cardiac valves in 20 patients. The mitral valve was replaced in 18 patients, applying the method described by Acar. The tricuspid valve was ...
Carr-White G S - - 2001
BACKGROUND: The Ross operation has several theoretical advantages. However, concern exists regarding evolving pathology in the pulmonary homograft. METHODS AND RESULTS: Consecutive patients (n=144; mean age 31 years, range 2 months to 64 years) undergoing the Ross operation were studied between 1993 and 2000. Echocardiographic examination of the pulmonary homograft ...
Sitges M - - 2001
When left ventricular outflow tract obstruction develops after aortic valve replacement, few treatment choices have been available until now. We present a patient with prior aortic valve replacement who developed left ventricle outflow tract obstruction that was successfully treated with a percutaneous transcoronary myocardial septal alcohol ablation. This technique is ...
Kleinman B - - 2001
A 77-year-old man became asystolic 3 days after aortic valve replacement and coronary artery bypass surgery. A dual-chamber temporary pacemaker generator was turned on but failed to discharge; instead, an obscure error message appeared on the liquid crystal display of the pacemaker. The intensive-care nurses and physicians were unable to ...
Byrne J G - - 2001
BACKGROUND AND AIM OF THE STUDY: With increasing use of homograft and autograft aortic valves for aortic valve replacement (AVR), more patients will be presenting for aortic valve reoperation due to structural degeneration of the homograft or autograft valve. Management options include homograft re-replacement, which may require extensive surgery, versus ...
Erez E - - 2001
OBJECTIVE: To evaluate the outcome of aortic root augmentation by the Konno-aortoventriculoplasty technique as part of reoperative aortic valve replacement. METHODS: Since 1983, 15 patients, 12 males and three females, had repeat aortic valve replacement (AVR) with concomitant Konno aortoventriculoplasty. Age ranged from 1.2 to 18 years (mean 12.5 years). ...
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