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.
The hymen is a membrane that surrounds or partially covers the external vaginal opening.It forms part of the vulva, or external genitalia, and is similar in structure to the vagina. In children, although a common appearance of the hymen is crescent-shaped, many shapes are possible.The effects of sexual intercourse and childbirth on the hymen are variable. If the hymen is sufficiently elastic, it may return to nearly its original condition.t forms part of the vulva, or external genitalia, and is similar in structure to the vagina. In children, although a common appearance of the hymen is crescent-shaped, many shapes are possible. The effects of sexual intercourse and childbirth on the hymen are variable.