Ventricular tachycardia can be difficult to differentiate from other causes of broad complex tachycardia. The following characteristics aid in the identification of VT.Features common to any broad complex tachycardia. Rapid heart rate (> 100 bpm). Broad QRS complexes (> 120 ms).
Eyeshine is a visible effect of the tapetum lucidum. When light shines into the eye of an animal having a tapetum lucidum, the pupil appears to glow. Eyeshine can be seen in many animals, in nature and in flash photographs.his classification does not include tapeta lucida in birds. Kiwis, stone-curlews, the boat-billed heron, the flightless kakapo and many nightjars, owls, and other night birds such as the swallow-tailed gull also possess a tapetum lucidum.
tapetum lucidum. the iridescent reflecting tissue layer of the choroid of some species of animals that gives their eyes the property of shining in the dark. It is characteristic of nocturnal animals and allows incident light two opportunities to stimulate the retinal receptors.Called also choroidal tapetum.apetum lucidum. A reflecting pigment layer lying behind the visual receptors of the retina of certain mammals (e.g. cats, dogs), birds and fish, which gives a shining appearance to the eyes when illuminated in the dark.