Non-invasive continuous and pulsed wave Doppler ultrasonography was performed in 102 consecutive patients with clinically ill defined systolic murmurs to differentiate between flow murmurs, mitral regurgitation, aortic stenosis, and ventricular septal defect, as well as to assess the severity of aortic stenosis. Diagnoses with the Doppler method were based on velocity, direction, and duration o...

A severe defect of optokinetic nystagmus (OKN) was found in 46 patients with congenital nystagmus. Abnormal patterns of OKN, such as superimposition of pendular oscillations on the optokinetic slow component and inversion of OKN, were observed. Optokinetic gain (eye movement velocity/drum velocity) was decreased compared to that in normal subjects, and optokinetic after-nystagmus, or transient ...

The ability of velocity methods to describe changes of topology by creating defects like holes is investigated. For the shape optimization energy-type objective functions are considered, which depend on the geometry by means of state variables. The state system is represented by abstract, quadratic, constrained minimization problems stated over domains with defects. The velocity method provides...

Recent experiments @E. M. Spain et al., J. Chem. Phys 102, 24 ~1995!# discovered alignment effects in cross sections for near-resonant energy-transfer collisions of Xe atoms with Ca Rydberg atoms at a single mean relative velocity. A collaborative quantum-mechanical study @W. Isaacs and M. A. Morrison, Phys. Rev. A 57, R9 ~1998!# confirmed these findings and discovered pronounced oscillations i...

Dyserythropoiesis, which morphologically and serologically resembles congenital dyserythropoietic anemia type III but is not accompanied by anemia, is described in a young man. In addition to striking gigantism and multinuclearity of erythroid precursors, electron microscopy revealed widening of nuclear pores, nuclear clefts, and cytoplasmic inclusions. Membrane transport of 5-methyltetrahydrof...

Most reported cases of traumatic abdominal wall herniation result from seatbelt or handlebar injuries. The diagnosis is often made on physical examination or abdominal computed tomography (CT). We report a 59-year-old man with traumatic herniation through the rectus muscle following low-velocity blunt abdominal trauma. This patient was init ially thought to have a rectus sheath haematoma and in...

In energetic materials, the localization of energy into “hotspots” is known to dictate initiation chemical reactions and detonation. Recent all-atom simulations have shown that more localized as internal potential (PE) than can be inferred from kinetic (KE) alone. The mechanisms associated with pore collapse hotspot formation are depend on geometry dynamic material response such plasticity. The...

Should clinical cardiologists incorporate the proximal isovelocity surface area (PISA) method into their ever enlarging armamentarium? This issue contains a paper comparing measurement of ventricular septal defect shunt ratio by a proximal iso-velocity surface area technique (usually abbreviated as PISA) method and by the Fick method.' The authors used some shortcuts in the PISA method, perhaps...