11/329. Ventricular thrombus and subarachnoid bleeding during support with ventricular assist devices.We report the case of a 23-year-old man with acute aortic valve insufficiency caused by endocarditis, who after emergency aortic valve replacement developed biventricular heart failure. The heart failure was treated with temporary assist devices. Subarachnoid bleeding and thrombus obstruction of the left ventricular outflow tract was detected. The postoperative course is presented with special emphasis on management of subarachnoid bleeding and the simultaneous use of anticoagulation necessary for ventricular assist devices.- - - - - - - - - - ranking = 1keywords = outflow, obstruction (Clic here for more details about this article) |
12/329. 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.- - - - - - - - - - ranking = 4.7144620198498keywords = outflow (Clic here for more details about this article) |
13/329. Fixed left ventricular outflow tract obstruction in presumed hypertrophic obstructive cardiomyopathy: implications for therapy.BACKGROUND: A subset of patients presenting with a presumed diagnosis of hypertrophic obstructive cardiomyopathy (HOCM) have a fixed left ventricular outflow tract (LVOT) obstruction. Recognition of this pathophysiologic abnormality is important in choosing therapy. methods: Of patients referred for treatment of HOCM, 4 had fixed LVOT obstruction. Clinical and echocardiographic data and surgical findings were reviewed. RESULTS: In the 4 patients with clinical features consistent with HOCM or HOCM-like conditions, echocardiography showed fixed LVOT obstruction with an early-peaking LVOT Doppler signal or absence of severe systolic anterior motion of the mitral valve. The causes of fixed obstruction included accessory mitral tissue with associated fibrous ring (1 patient), fixed subaortic tunnel stenosis (2 patients), and a discreet subaortic ridge (1 patient). After surgical relief of the fixed LVOT obstruction, all patients had relief of the ventricular outflow tract gradient. CONCLUSIONS: Not all patients with a presumed diagnosis of HOCM have isolated dynamic LVOT obstruction but may have isolated or additional fixed obstruction. Careful two-dimensional and Doppler echocardiography are needed to identify this subset of patients who are best treated surgically.- - - - - - - - - - ranking = 6.2855379801502keywords = outflow, obstruction (Clic here for more details about this article) |
14/329. Left ventricular outflow tract obstruction with mitral mechanical prosthesis.Left ventricular outflow tract obstruction after mitral valve replacement may occur when the native mitral apparatus is preserved intact. Although it has usually been reported using bioprostheses, we present one case using a low-profile mechanical prosthesis. The reduction of left ventricular dimensions and valvular redundancy contributed to this complication. We obtained definitive relief of left ventricular outflow tract obstruction by transaortic exposure and partial resection of the obstructing tissue with the help of video-assisted cardioscopy.- - - - - - - - - - ranking = 6keywords = outflow, obstruction (Clic here for more details about this article) |
15/329. Asymptomatic left ventricular outflow tract obstruction after mitral valve replacement with leaflet preservation.It has been shown that inappropriate anterior mitral leaflet preservation during mitral valve replacement may cause left ventricular outflow tract (LVOT) obstruction, usually with dismal prognosis. In this report, we describe a patient with chronic asymptomatic LVOT obstruction after mitral valve replacement with leaflet preservation.- - - - - - - - - - ranking = 5.05710759603keywords = outflow, obstruction (Clic here for more details about this article) |
16/329. Dynamic obstruction, an unusual complication after aortic valve replacement with a stentless porcine valve.In the early nineties, the stentless porcine aortic bioprosthesis has been reintroduced successfully. Because of the limited experience, knowledge of clinical complications is limited. Therefore, we describe an unusual complication of dynamic obstruction after aortic valve replacement with a stentless porcine valve in a 70 year old man 18 months after implantation. We discuss the complications of stentless aortic prostheses known so far, describe operative techniques used and their characteristic two dimensional echocardiographic images.- - - - - - - - - - ranking = 0.28553798015024keywords = obstruction (Clic here for more details about this article) |
17/329. Dynamic outflow obstruction due to the transient extensive left ventricular wall motion abnormalities caused by acute myocarditis in a patient with hypertrophic cardiomyopathy: reduction in ventricular afterload by disopyramide.A 65-year-old woman was admitted to the coronary care unit because of acute pulmonary edema. Immediate 2-dimensional and Doppler echocardiograms revealed extensive left ventricular wall motion abnormalities and left ventricular hypertrophy with extreme outflow obstruction. Although an ECG showed ST-segment elevation in the anterolateral leads, a coronary arteriogram revealed normal epicardial arteries. heart failure was relieved after diminishing the dynamic outflow obstruction with disopyramide administration. An endomyocardial biopsy from the right ventricle on the 8th hospital day showed borderline myocarditis. Wall motion abnormalities gradually normalized within 2 weeks. It is speculated that her pulmonary edema would not have been relieved so readily without the immediate reduction in ventricular afterload by disopyramide. These clinical changes over time were observed with serial echo-Doppler examinations.- - - - - - - - - - ranking = 31.532888499824keywords = outflow obstruction, outflow, obstruction (Clic here for more details about this article) |
18/329. Dynamic left ventricular outflow tract obstruction in acute coronary syndromes: an important cause of new systolic murmur and cardiogenic shock.Dynamic left ventricular outflow tract (LVOT) obstruction has traditionally been associated with hypertrophic obstructive cardiomyopathy. Recently, acute dynamic LVOT obstruction has been described as a complication of myocardial infarction (MI). Herein the cases of 3 patients are described, all of whom presented with a systolic murmur and electrocardiographic evidence of MI. All 3 patients developed cardiogenic shock and were subsequently found by echocardiography to manifest an acute dynamic LVOT obstruction. Cardiogenic shock persisted until therapy was directed toward decreasing the degree of the dynamic LVOT obstruction. The treatment of acute coronary syndromes in the presence of a dynamic LVOT obstruction differs from the traditional treatment of acute coronary syndromes and includes the use of beta-blockers and alpha1-agonists, as well as the avoidance of therapies that aggravate the magnitude of the LVOT obstructive gradient, including nitrates, inotropic agents, and afterload reduction. The development of a systolic murmur in the setting of acute MI complicated by cardiogenic shock with only a small elevation in creatine kinase suggests the presence of a dynamic LVOT obstruction, as well as the classical mechanical complications of MI, namely, ventricular septal rupture and papillary muscle rupture. The presence of a dynamic LVOT obstruction is reliably detected by transthoracic echocardiography or by transesophageal echocardiography if transthoracic image quality is suboptimal.- - - - - - - - - - ranking = 5.3426455761803keywords = outflow, obstruction (Clic here for more details about this article) |
19/329. Accessory mitral valve tissue causing severe subaortic stenosis with dextrocardia in a premature newborn.We report an unusual case of left-ventricular outflow obstruction caused by accessory mitral valve tissue associated with dextrocardia and ventricular septal defect in a seven-day-old, 2200 grams premature infant, who was referred with a heart murmur. The diagnosis was made by two-dimensional and Doppler echocardiography which demonstrated the accessory tissue as well as a 100 mmHg peak systolic gradient between the left ventricle and the aorta. Ten days after the presentation the infant underwent emergency surgery after respiratory arrest and recurrent episodes of syncope. The accessory mitral valve tissue and its fibrous extension were excised and the ventricular septal defect was closed. We believe that surgical treatment of patients with accessory mitral valve tissue should be performed early because of the possibility of acute deterioration. Combined aortotomy and interatrial approach is very helpful in evaluating the anatomy and the mitral valve function as well as delineating the tissue to be excised.- - - - - - - - - - ranking = 5.2554814166374keywords = outflow obstruction, outflow, obstruction (Clic here for more details about this article) |
20/329. Obstruction of the right ventricular outflow tract caused by a tuberculoma in a patient with ventricular septal defect and aneurysm of the membranous septum.Reported here is an obstruction of the right ventricular outflow tract caused by a tuberculoma in a 15-year-old boy who presented with a ventricular septal defect. The obstruction was discovered at surgery and the tuberculous aetiology was only demonstrated histologically. To the authors' knowledge, this is the first report of a tuberculoma of the heart associated with congenital heart disease.- - - - - - - - - - ranking = 4.8286772119099keywords = outflow, obstruction (Clic here for more details about this article) |
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