نتایج جستجو برای: atrioventicular valve
تعداد نتایج: 107768 فیلتر نتایج به سال:
The behaviour of the cryogenically treated En52 martensitic valve steel has been experimentally analyzed in this paper. Material samples are subjected to deep cryogenic treatment after completing the regular heat treatment. The critical properties of the valve steel like wear resistance, hardness, tensile strength and impact strength are evaluated for the cryo treated En52 valve steel samples a...
one of the most serious complications of mitral valve replacement is left ventricular rupture and pseudoaneurysm formation, which is rare but potentially lethal. we herein present a late type of post mitral valve replacement and coronary artery bypass surgery pseudoaneurysm in a 74-year-old female, who was admitted to our hospital with a recent history of exertional dyspnea. she had the above-m...
background: primary intra cardiac tumors are rare. in this article, we present papillary fibroelastoma of mitral valve chordae. case presentation: a 35-year old man presented with atypical chest pain and palpitation. physical examination and electrocardiogram were normal. transesophageal echocardiography (tee) revealed a mass of 1015 mm attached to chordae of anteromedial papillary muscle of m...
microembolic signals (mes) are frequently observed in transcranial doppler (tcd) recordings of patients with mechanical heart valve (mhv). if gaseous bubbles are the underlying cause, number of mes produced by mhv could be reduced with oxygen inhalation. from september 2003 to september 2004, a consecutive series of 14 patients with st jude aortic valve visited in the cardiology clinic were...
background: echocardiography is the most common test used for the evaluation of aortic regurgitation (ar). however, the role of echocardiography as an available and inexpensive method in the quantification of ar by the left ventricle to right ventricle stroke volume ratio (lv/rv sv ratio) has not been completely investigated. methods: between june 2005 and december 2007, 132 consecutive patient...
cardiac hydatid cyst (chc) is a rare disease that was endemic in some regions especially in sheep-raising areas. the most commonly accepted theory for the routes of heart involvement in hydatid cyst was infestation by the hexacanthus embryo through coronary arteries. here, we describe a case with the primitive cardiac hydatid cyst located around the pulmonary valve (pv) and main pulmonary arter...
conclusions preservation of mitral annulus and papillary muscle continuity may enhance post- mvr cardiac performance with low mortality and morbidity rates. the risk of pvd was not significantly higher than conventional mvr in our series. results the improvement of functional status was seen in almost all survivors but was more obvious in the group i. in early follow-up, 56.4% of group i cases ...
critical pulmonary valve stenosis (cpvs) and atrial septal defect (asd) is an uncommon form of congenital heart disease. concurrent transcatheter pulmonary valvuplasty and closure of secundum atrial septal defect appears to be an interesting alternative to surgical correction. we present the simultaneous balloon valvuloplasty of critical pulmonary stenosis (ps) with supra systemic right ventric...
the hot compression tests were carried on x45crniw189 valve steel (x45) in the temperature rangeof 1000– 1200 °c and the strain rate range of 0.004 – 0.5 s-1 in order to study the high temperaturesoftening behavior of this steel. for the exact prediction of flow stress, the effective stress-effectivestrain curves were obtained from experiments under various conditions. on the basis of experimen...
granulocytic sarcomas (chloromas) are rare extramedullary tumors consisting of primitive granulocytic cells. we report here on a case of a 23-year-old man who presented with a generalized swelling. he is known case of acute myelomonocytic leukemia. granulocytic sarcomas are rare, destructive, extramedullary tumor masses that consist of immature granulocytic cells. in this unusual patient's case...
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