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Long QT intervals predispose the patient to an R-on-T phenomenon, wherein the R-wave, representing ventricular depolarization, occurs during the relative refractory period at the end of repolarization (represented by the latter half of the T-wave). An R-on-T can initiate torsades. Sometimes, pathologic T-U waves may be seen in the ECG before ...
There are only 10–20 cases annually in the United States. [1] These cases occur mostly in boys and young men (mean age 15), usually during sports participation. [1] It occurs most frequently in baseball when the hard ball strikes an unprotected chest, although there have been cases of commotio cordis in players using a chest protector. [1]
Rolled r or rolling r refers to consonant sounds pronounced with a vibrating tongue or uvula: Alveolar trill, a consonant written as ...
A phenomenon is any observable occurrence. Phenomena are often, but not always, understood as 'appearances' or ' experiences '. These are themselves sometimes understood as involving qualia .
Rhotacism (/ ˈ r oʊ t ə s ɪ z əm / ROH-tə-siz-əm) [1] or rhotacization is a sound change that converts one consonant (usually a voiced alveolar consonant: /z/, /d/, /l/, or /n/) to a rhotic consonant in a certain environment.
This involves a paper-and-pencil procedure, where readers are asked to circle a target letter, such as "t" every time they come across it while reading a prose passage or text. [3] [4] Researchers measure the number of letter detection errors, or missed circled target letters, in the texts. The missing letter effect is more likely to appear ...
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