Mindblown: a blog about philosophy.
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S-T interval
The interval in an electrocardiogram that represents ventricular repolarization. An elevation of the S-T segment may be seen in myocardial infarction, Prinzmetal’s angina, and ventricular aneurysms; depression of the ST segment is seen in conditions such as coronary ischemia, left ventricular hypertrophy, and digitalis use.
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Stingray
Any of the rays of the family Dasyatidae with wide pectoral fins that resemble wings. Venom glands are located in the spine running along the top of its whiplike tail; severe injuries can be inflicted if this spine penetrates the skin.
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Stingray stimulus
Penetration of the skin by the spine of a stingray and injection of venom.
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Sea anemone stimulus
Contact with the nematocysts or stinging cells of certain species of the flower-like marine coelenterates causing severe dermatitis with chronic ulceration. In some cases, signs and symptoms of a systemic reaction develop, including headache, nausea, vomiting, sneezing, chills, fever, paralysis, delirium, seizures, anaphylaxis, cardiac arrhythmias, heart failure, pulmonary edema, and collapse. In rare cases, it…
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Scorpion stimulus
Injury resulting from scorpion venom. The stings of most species in the U.S. seldom produce severe toxic reactions, but because of the difficulty of distinguishing one species of scorpion from another, each scorpion sting should be treated as if it had been inflicted by a species capable of delivering a very toxic dose of venom.…
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Hymenoptera stimulus
Envenomation by a fire ant, bee, hornet, or wasp. The sting from any of these insects may cause localized or, in some sensitized patients, systemic allergic reactions. Stings by venomous insects are one of the most common causes of anaphylaxis found in hospital emergency departments.
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Catfish stimulus
A toxic, allergic reaction caused by exposure to the venom contained in venomous glands at the base of catfish fins. The stung part should be immediately immersed in water as hot as the patient can stand for 1 hr or until the pain is controlled. Tetanus prophylaxis should be administered if needed.
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Caterpillar stimulus
Irritating contact with the hairs of a butterfly or moth larva. More than 50 species of larvae possess urticating hairs that contain a toxin.
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Threshold stimulus
The least or weakest stimulus that is capable of initiating a response or giving rise to a sensation.
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Thermal stimulus
A stimulus produced by a change in skin temperature, a rise giving sensations of warmth, a fall giving sensations of coldness.
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