نتایج جستجو برای: lvot gradient
تعداد نتایج: 126769 فیلتر نتایج به سال:
Computed tomography angiogram showing severe calcification of the left ventricular outflow tract (LVOT) along the intravalvular fibrous curtain. A n 87-year-old patient with severe aortic stenosis underwent transapical transcatheter aortic valve replacement with a 26-mm Edwards Sapien valve (Edwards Lifesciences, Irvine, California). Pre-operative imaging was notable for severe asymmetric calci...
Abstract Background It is a challenging goal to identify which family members of patients with hypertrophic cardiomyopathy (HCM) will subsequently develop HCM. Previous studies evaluating the utility two-dimensional conventional Doppler echocardiography in HCM families known pathogenic variant identified on genetic testing have been unable reliably distinguish preclinical genotype-positive, phe...
Congenital aortic valve stenosis (AVS), coarctation of the aorta (COA) and hypoplastic left heart syndrome (HLHS) are congenital cardiovascular malformations that all involve the left ventricular outflow tract (LVOT). They are presumably caused by a similar developmental mechanism involving the developing endothelium. The exact etiology for most LVOT malformations is unknown, but a strong genet...
H ypertrophic cardiomyopathy (HCM) is an inherited cardiac disorder characterised by abnormal left ventricular (LV) hypertrophy in the absence of severe aortic stenosis and hypertension. The presence of a dynamic gradient in the left ventricular outflow tract (LVOT) above 30 mm Hg at rest is associated with an increased mortality. Surgical myectomy or transcoronary ablation of septal hypertroph...
BACKGROUND Ventricular arrhythmias (VAs) originating from the anterosuperior left ventricular outflow tract (LVOT) represent a challenging location for catheter ablation. This study investigates mapping and ablation of VA from anterosuperior LVOT via a transseptal approach. METHODS AND RESULTS This study included 27 patients with symptomatic VA, of which 13 patients had previous failed ablati...
BACKGROUND Echocardiography combining Doppler and two-dimensional data is recommended for quantitative assessments of valvular regurgitation. We applied a new method to calculate the mitral annulus (MA) area in combination with multiple sample sites. Individuals without regurgitation in whom the valvular and left ventricular stroke volumes (SV) should be identical were investigated in order to ...
BACKGROUND Owing to its elliptical shape, the left ventricle outflow tract (LVOT) area is underestimated by two-dimensional (2D) diameter-based calculations which assume a circular shape. This results in overestimation of aortic stenosis (AS) by the continuity equation. In cases of moderate to severe AS, this overestimation can affect intraoperative clinical decision making (expectant managemen...
Apart from support of heart rate in patients of symptomatic bradycardia, in the last two decades, the indications of pacemakers have widened to prevent arrhythmias, optimise hemodynamic functions and suppress tachyarrhythmias. Pacemakers have been successfully used in Hypertrophic Obstructive Cardiomyopathy (HOCM) to reduce LVOT gradient and in improving cardiac output in patients of dilated ca...
Dynamic left ventricular outflow tract (LVOT) obstruction is a distinctive finding on echocardiography and often supports a diagnosis of hypertrophic obstructive cardiomyopathy (HOCM). It is also a clinical entity in its own right and is reproducible with stress. We describe a case of dynamic outflow obstruction in an elderly man with classical exertional symptoms. Echocardiography was used to ...
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