Publications by authors named "G Zaccone"
Aims: Subclinical thrombosis may represent an early stage of prosthesis structural disease. Most of the available evidence on the incidence, location, predictors, and consequences of thrombosis comes from studies that have employed balloon-expandable valves. We aimed to describe the different localisations of valvular and perivalvular thrombosis and analyse prosthesis-host multi-detector computed tomography predictors in the context of self-expandable prosthesis.
View Article and Find Full Text PDFObjectives: We sought to assess whether post-implant transcatheter aortic valve prosthesis multidetector computed characteristics differ between patients with native tricuspid and bicuspid aortic valve stenosis, as well as the effect on valve performance and clinical implications.
Methods: We analysed 100 consecutive post-implant multidetector computed tomography scans to assess self-expandable prosthesis non-uniform expansion at 6 pre-specified valvular levels, and other specific parameters, including valvular and perivalvular thrombosis at 6 months follow-up. Echocardiographic prosthesis performance and clinical outcome were also evaluated.
Article Synopsis
- The study examined the structure of photoreceptors and neuron arrangement in the retina of the red-tail shark using light and electron microscopy.
- The retina contains a mosaic of photoreceptors including double cones, single cones, and single rods, with a ratio of approximately 3 cones to every 1.39 rods, indicating a predominance of cones.
- Findings showed complex synaptic connections in the outer plexiform layer, with differences in synaptic structures between rods and cones, which may enhance the shark's ability to resolve visual details.
The pseudobranch is a gill-like structure that exhibits great variations in structure and function among fish species, and therefore, it has remained a topic of investigation for a long time. This study was conducted on adult Molly fish (Poecilia sphenops) to investigate the potential functions of their pseudobranch using histological, histochemical, immunohistochemical analysis, and scanning electron microscopy. The pseudobranch of Molly fish was of embedded type.
View Article and Find Full Text PDFThis work reports on the structural characteristics of the respiratory gas bladder of the osteoglossiform fish Heterotis niloticus. The bladder-vertebrae relationships are also analyzed. A slit-shaped orifice in the mediodorsal pharyngeal wall is surrounded by a muscle sphincter and serves as a glottis-like opening to the gas bladder.
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