نتایج جستجو برای: vt
تعداد نتایج: 6535 فیلتر نتایج به سال:
BACKGROUND The purpose of this study was to assess whether delayed enhancement (DE) on MRI is associated with ventricular tachycardia (VT)/ventricular fibrillation or death in patients with cardiac sarcoidosis and left ventricular ejection fraction >35%. METHODS AND RESULTS Fifty-one patients with cardiac sarcoidosis and left ventricular ejection fraction >35% underwent DE-MRI. DE was assesse...
ustained monomorphic ventricular tachycardia (VT) is most often related to myocardial structural heart disease, including a healed myocardial infarction, and cardiomyopathies. However, no apparent structural abnormalities are identified in approximately 10% of all cases of sustained monomorphic VT in the United States1 and in 20% of those in Japan.2 These cases of VT are referred to as “idiopat...
BACKGROUND We tested whether or not heart rate variability (HRV) changes can serve as early signs of ventricular tachycardia (VT) and predict slow and fast VT in patients with an implantable cardioverter defibrillator (ICD). METHODS AND RESULTS We studied the ICD stored 1000 beat-to-beat intervals before the onset of VT (131 episodes) and during a control time without VT (74 series) in 63 chr...
BACKGROUND Percutaneous left ventricular assist devices (pLVADs) are increasingly being used to facilitate ablation of unstable ventricular tachycardia (VT), but the safety profile and hemodynamic benefits of these devices have not been described in a systematic, prospective manner. METHODS AND RESULTS Twenty patients with scar VT underwent ablation with a pLVAD. Neuromonitoring using cerebra...
SUZUKI, K. Clinical Features of Sustained Ventricular Tachycardia among Various Underlying Heart Diseases. Tohoku J. Exp. Med., 1990, 162 (1), 15-26 Clinical findings of 52 patients with sustained ventricular tachycardia (VT) were analyzed to assess the importance of the underlying etiology. Among patients with organic heart diseases, no differnces were found in the VT rate, the incidence of sy...
BACKGROUND Cardiac sarcoid-related ventricular tachycardia (VT) is a rare disorder; the underlying substrate and response to ablation are poorly understood. We sought to examine the ventricular substrate and outcomes of catheter ablation in this population. METHODS AND RESULTS Of 435 patients with nonischemic cardiomyopathy referred for VT ablation, 21 patients (5%) had cardiac sarcoidosis. M...
Background: Invasive and non-invasive tests have been used to identify the risk of ventricular tachycardia (VT) in patients with chagas’ cardiomyopathy (CCM). Cardiac magnetic resonance imaging (CMRI) using the delayed enhancement (DE) technique can be useful to select patients with global or segmentary ventricular dysfunction, with high degree of fibrosis and at higher risk for clinical VT. Ob...
Eight cases of hemolytic-uremic syndrome in which no pathogens were isolated were diagnosed serologically by a passive hemagglutination assay and a verotoxin (VT; Shiga-like toxin) enzyme-linked immunosorbent assay (ELISA). The passive hemagglutination assay employed formalinized sheep erythrocytes sensitized with soluble native antigen or heat-treated antigen (lipopolysaccharide [LPS]) from Es...
The first diagonalization step in a rho-axis-method treatment of methyl-top internal rotation problems involves finding eigenvalues and eigenvectors of a torsional Hamiltonian, which depends on the rotational projection quantum number K as a parameter. Traditionally the torsional quantum number vt = 0, 1, 2···is assigned to eigenfunctions of given K in order of increasing e...
BACKGROUND Death during the first year after myocardial infarction is most commonly due to spontaneous ventricular tachycardia (VT) or fibrillation (VF). The purpose of this study was to compare, in a single cohort of patients, the values of inducible VT, delayed ventricular activation, low left ventricular ejection fraction, high-grade ventricular ectopy, and ST segment displacement on exercis...
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