Cases reported "Aortic Valve Stenosis"

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1/303. An unusual combination of cardiovascular surgical disorders.

    A 53-year-year-old man presented with aortic regurgitation, subvalvular and supravalvular aortic stenoses, and aneurysms involving the ascending aorta, the arch, and the innominate, right subclavian, and left common carotid arteries. Surgery consisted of resection of the obstructive lesions, replacement of the aortic valve, graft replacement of the ascending aorta, and the arch resection of innominate and subclavian artery aneurysms and reconstruction with a side limb to which the right carotid artery was anastomosed. The patient has remained asymptomatic with full employment.
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2/303. Iatrogenic left main coronary artery stenosis.

    Iatrogenic left main coronary artery stenosis is a potentially life-threatening complication of cardiac valve replacement surgery due to injury by perfusion cannulas. This requires prompt clinical recognition and diagnosis by repeat coronary angiography, and treatment by early coronary artery bypass grafting. We present 3 patients who had normal coronary arteries prior to valve replacement surgery, and who developed severe left main coronary artery stenosis after surgery. Accelerating angina and refractory ventricular arrhythmia were presenting clinical manifestations. coronary artery bypass grafting was successfully performed in all 3 patients.
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3/303. The Freestyle stentless bioprosthesis for prosthetic valve endocarditis.

    We report a case of methicillin-resistant staphylococcus aureus-induced prosthetic valve endocarditis, which was successfully treated with aortic valve replacement using the Freestyle stentless bioprosthesis. The total root and stentless design of this bioprosthesis allows for more radical removal of infected tissue and easier treatment for annular abscess, while requiring less prosthetic materials than a conventional prosthesis. This bioprosthesis thus seems to be a valuable option for active endocarditis.
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4/303. Combined aortic and mitral stenosis in mucopolysaccharidosis type I-S (Ullrich-Scheie syndrome).

    The genetic mucopolysaccharidosis syndromes (MPS) are autosomal recessive inborn errors of metabolism. Heart valve involvement in MPS is not uncommon but only a few case reports of successful cardiac surgery are available. In particular, reports of combined aortic and mitral stenosis associated with MPS type I-S are very rare. Both type I and type VI MPS are associated with significant left sided valvar heart disease that requires surgical valve replacement because of irregular valve thickening, fibrosis, and calcification. A 35 year old man had severe mitral valve stenosis after successful surgical replacement of a stenotic aortic valve. Valvar heart disease was investigated by cardiac ultrasound and left heart catheterisation. Histomorphological characterisation of the affected mitral valve was performed. The case illustrates typically associated clinical features of cardiac and extracardiac abnormalities found in MPS type I-S.
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5/303. Recurrent endocarditis in silver-coated heart valve prosthesis.

    BACKGROUND AND AIM OF THE STUDY: In order to prevent prosthetic valve endocarditis (PVE), the implantation of a new silver-coated sewing ring has been introduced to provide peri- and postoperative protection against microbial infection. methods: A 56-year-old woman with aortic stenosis had elective replacement with a St. Jude Medical mechanical valve fitted with a silver-coated sewing ring (Silzone). The patient developed early PVE, which necessitated reoperation after one month. Despite a second Silzone prosthesis being implanted, the endocarditis recurred. During a third operation an aortic homograft was implanted, and after six months a fourth operation was performed for a pseudoaneurysm at the base of the homograft, in proximity to the anterior mitral valve leaflet. RESULTS: The diagnosis of PVE was confirmed by the presence of continuous fever, transesophageal echocardiography and growth of penicillin-resistant staphylococcus epidermidis from the valve prosthesis. CONCLUSION: The implantation of all prosthetic valves is encumbered with a risk of endocarditis. Although silver has bacteriostatic actions, the advantages of silver-coated prostheses in the treatment of this condition have yet to be assessed in clinical trials.
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6/303. Aortoventriculoplasty after a prior posterior root enlargement (Manougian): case report.

    A patient with congenital bicuspid aortic stenosis had an open commissurotomy followed 3 years later by a Manougian's operation along with an aortic valve replacement. Nine years later, due to residual aortic stenosis, a Konno's anterior root enlarging procedure with an aortic valve replacement was successfully done. Good relief of aortic and subaortic stenosis and the absence of significant gradient across the left ventricular outflow tract led us to believe that successful and effective relief could be obtained by adding a Konno-type of enlargement to a previously performed posterior enlargement procedure.
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7/303. Echocardiographic diagnosis of left ventricular outflow tract obstruction caused by an acquired subaortic membrane after mitral valve replacement.

    Although an acquired subaortic membrane has been reported as a cause of left ventricular outflow tract (LVOT) obstruction in various clinical settings, it previously has not been reported after mitral valve surgery. We describe 3 cases of acquired LVOT obstruction that resulted from development of a subaortic membrane after mitral valve replacement. This report emphasizes the role of an acquired subaortic membrane in LVOT obstruction after mitral valve replacement, the use of echocardiography in diagnosing this condition, and the importance of early intervention.
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8/303. aortic valve stenosis with left ventricular outflow tract pressure gradient.

    A 61-year-old man was diagnosed with severe aortic valve stenosis with left ventricular outflow tract pressure gradient due to systolic anterior movement of the mitral valve and a large poststenotic dilation of the ascending aorta. He underwent successful aortic root replacement and concomitant septal myectomy.
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9/303. Intrapericardial organized hematoma. A rare complication after open heart surgery.

    Intrapericardial organized hematoma, which compresses cardiac chambers late after open heart surgery, is extremely rare. We report a case of intrapericardial organized hematoma in a 63-year-old man who underwent aortic valve replacement 8 years prior, which may have aggravated rheumatic mitral valve regurgitation compressing the mitral valve anulus. Under extracardiopulmonary bypass and cardioplegic heart arrest, we removed the hematoma and replaced the mitral valve with a 27 mm St. Jude Medical valve. There were no bleeding points on the heart and pericardium at operation and no history of blunt chest trauma. The etiology of the hematoma is uncertain.
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10/303. Aortic stenosis in endogenous ochronosis.

    Endogenous ochronosis, a rare inherited disease of tyrosine metabolism, is caused by a deficiency of the enzyme, homogentisic acid oxidase, and may lead to cardiovascular involvement seen most frequently as aortic valve stenosis. We report the case of a patient with generalized ochronosis who developed cardiovascular symptoms due to aortic valve stenosis and who underwent aortic valve replacement.
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