PURPOSE To compare the use of optical coherence tomography angiography (OCTA) and adaptive optics scanning light ophthalmoscope fluorescein angiography (AOSLO FA) for characterizing the foveal microvasculature in healthy and vasculopathic eyes. METHODS Four healthy controls and 11 vasculopathic patients (4 diabetic retinopathy, 4 retinal vein occlusion, and 3 sickle cell retinopathy) were ima...

BACKGROUND Direct noninvasive visualization of the coronary vessel wall may enhance risk stratification by quantifying subclinical coronary atherosclerotic plaque burden. We sought to evaluate high-resolution black-blood 3D cardiovascular magnetic resonance (CMR) imaging for in vivo visualization of the proximal coronary artery vessel wall. METHODS AND RESULTS Twelve adult subjects, including...

Restenosis secondary to intimal hyperplasia within small diameter intravascular stents is a major problem in the adult population with atherosclerotic vascular disease. In contrast, most large series of stent implants in congenital lesions suggest that restenosis is rarely a problem. Schneider and colleagues, in this issue of Heart, point out that paediatric patients grow and that stents implan...

BACKGROUND A proven advantage of radial over femoral arterial access has led to an increase in the number of interventions performed via radial artery access in patients with acute coronary syndromes. Both assessment of the pulse volume and the Allen's test are subjective and subject to investigator bias. An ultrasound examination of the forearm arteries provides important information about the...

Objectives: To assess the extent of neointimal proliferation and the safety and efficacy of stent redilatation in patients with stents implanted for aortic coarctation or branch pulmonary artery stenosis. Design: Retrospective observational study. Setting: Tertiary referral centre. Patients and interventions: Of 60 patients with Palmaz stents, 12 with coarctation and 12 with branch pulmonary ar...

Methods A measuring ophthalmoscope based on the Zeiss retina camera RC 310 is coupled with a CCD device. A frame grabber digitizes the picture section with the interesting vessel segments. An adaptive algorithm recognizes the position and direction of the vessels automatically and calculates the vessel diameters. Other measuring data are recorded additionally, for example the R spike of the ele...

OBJECTIVES To assess the extent of neointimal proliferation and the safety and efficacy of stent redilatation in patients with stents implanted for aortic coarctation or branch pulmonary artery stenosis. DESIGN Retrospective observational study. SETTING Tertiary referral centre. PATIENTS AND INTERVENTIONS Of 60 patients with Palmaz stents, 12 with coarctation and 12 with branch pulmonary ...

We have developed a thermal model in which blood vessels are described as geometrical objects, 3D curves with associated diameters. Here the behaviour of the model is examined for low resolutions compared with the vessel diameter and for strongly curved vessels. The tests include a single straight vessel and vessels describing the path of a helix embedded in square tissue blocks. The tests show...

Methods A measuring ophthalmoscope based on the Zeiss retina camera RC 310 is coupled with a CCD device. A frame grabber digitizes the picture section with the interesting vessel segments. An adaptive algorithm recognizes the position and direction of the vessels automatically and calculates the vessel diameters. Other measuring data are recorded additionally, for example the R spike of the ele...

Methods A measuring ophthalmoscope based on the Zeiss retina camera RC 310 is coupled with a CCD device. A frame grabber digitizes the picture section with the interesting vessel segments. An adaptive algorithm recognizes the position and direction of the vessels automatically and calculates the vessel diameters. Other measuring data are recorded additionally, for example the R spike of the ele...