Hans Heiner Kramer

Learn More
BACKGROUND Definition of normative data of the great arteries from neonatal to adult ages may aid in assessment of the growth of cardiovascular structures, thus guiding the timing and type of intervention in patients with congenital cardiac disease. METHODS We calculated the cross-sectional areas of the arterial roots at the basal attachment of the valvar(More)
Transcatheter closure of ventricular septal defects with the Amplatzer Membranous VSD Occluder has yielded promising initial results, but disturbances of conduction, including complete heart block, have been reported. We report our experience with the Amplatzer occluder in 35 patients with a median age 4.5 years, the defects being sized angiographically at(More)
Over the last 5 years, interventional MR imaging has been fertile ground for research. Real-time MR imaging, combined with recent advances in other MR imaging modalities such as perfusion imaging and intravascular imaging, has opened up new paths for cardiac therapy. The recent reports on cardiac stem cell therapy guided and monitored by MR imaging suggest(More)
We report our initial experience in using the Amplatzer vascular plug for closure of coronary arterial fistulas. The self-expanding, cylindrical, device is made from Nitinol wire mesh, and is available from 4 to 16 millimetres in diameter. We have now used the device to close fistulas in 3 patients, aged from 3 to 14 years, who presented with ratios of(More)
OBJECTIVE This study was undertaken to determine the impact of specific intensive care procedures on preoperative hemodynamics, incidence of preoperative organ dysfunction, and in-hospital mortality among neonates with hypoplastic left heart syndrome with pulmonary overcirculation and to assess the influence of the change in preoperative management on early(More)
Congenital interruption of the inferior vena cava (IVC) due to absence of its hepatic segment is usually found in patients with polysplenia. The occurrence without other features of the heterotaxy syndrome is rare, and the frequency of associated additional vascular and cardiac anomalies in these patients is not well known. We reviewed the literature and(More)
OBJECTIVE Case reports of patients with Amplatzer devices used in positions they have not been designed for have repeatedly been published. BACKGROUND We pooled our results to review the array of such interventions. METHODS Retrospective study of twelve patients presented with eleven different problems: Two patients had hepatoatrial communication after(More)
A 12 years and 8 months old girl with tuberous sclerosis developed focal motor and sensory seizures and hemiplegias initially right-sided and later left-sided. Cerebral angiography showed bilateral and symmetrical vascular network with teleangiectasias in the region of the basal ganglia and bilateral stenoses and ectasias of the middle cerebral artery. It(More)