Ulrich Römer

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Three-dimensional echocardiography is increasingly available. We report our experience with 3D reconstructions of ventricular septal defects: Unique images of all different types of ventricular septal defects are reconstructed from left and right ventricular en-face views. The images are discussed according to pathological classifications. The images shown(More)
PURPOSE In congenital heart disease, the exact determination of the right ventricular function is of high importance for therapeutic and especially surgical planning. The aim of this study was to correlate the parameters of the right ventricular function in MRI and 3D echocardiography to determine the agreement of both modalities. MATERIALS AND METHODS In(More)
We report a rare case of a successful cardiac transplantation in a patient suffering from cardiomyopathy and complex mitochondrial disease. The patient presented with severe heart failure and malignant ventricular arrhythmias requiring implantation of a defibrillator and advanced medical treatment. The patient was listed for urgent heart transplantation and(More)
BACKGROUND Since introduction in 1999, pulmonary valve replacement in pediatric patients with the Contegra conduit (Medtronic Inc, Minneapolis, MN) has gained widespread application with increasing enthusiasm. However, unexpected graft related adverse effects may occur. METHODS Between April 2001 and December 2002, 29 patients (20 male; mean age, 3.39 +/-(More)
INTRODUCTION Heart transplantation (HTx) has increasingly become a therapeutic option for end-stage heart failure of any origin in children. Short- and mid-term results are promising. However, long-term outcome has been a matter of concern because of acute or chronic rejection and side effects of immunosuppression. We performed a retrospective study of up(More)
This paper addresses the nonlinear elliptic curl–curl equation with uncertainties in the material law. It is frequently employed in the numerical evaluation of magnetostatic fields, where the uncertainty is ascribed to the so–called B–H curve. A truncated Karhunen – Lò eve approximation of the stochastic B – H curve is presented and analyzed with regard to(More)
BACKGROUND Patients with hypoplastic left heart syndrome (HLHS) and associated malformations undergo Norwood palliation or potentially a two-ventricle repair. METHODS Since 8/99, 8 patients with typical HLHS and two with DILV underwent Norwood/Fontan palliation (group I). Three other patients (group II) had two-ventricle repair. Anatomy was: aortic(More)
BACKGROUND Pediatric heart transplantation is a surgical therapy for dilated cardiomyopathy and for complex congenital heart defects with low pulmonary artery resistance. However, it is still discussed as controversial because of uncertain long-term results. We report our experience with pediatric heart transplantation in a heterogeneous population. (More)
The temperature developed in bondwires of integrated circuits (ICs) is a possible source of malfunction, and has to be taken into account during the design phase of an IC. Due to manufacturing tolerances, a bondwire's geometrical characteristics are uncertain parameters, and as such their impact has to be examined with the use of uncertainty quantification(More)
BACKGROUND To report our experience with extracorporeal membrane oxygenation (ECMO) in a congenital heart surgery program. METHODS Since 12/1996, 24 patients (8 newborns, 9 infants, 3 children, 4 adolescents/ adults 17-23 years), mean age 4.0+/-7.4 years (2 days-23 years), body weight 2.7-87 kg had ECMO as circulatory support. Indication was failure to(More)