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The dimensionally correct form of Bazett's formula is: = where QTc B is the QT interval corrected for heart rate, and RR is the interval from the onset of one QRS complex to the onset of the next QRS complex. This dimensionally correct formula returns the QTc in the same units as QT, generally milliseconds.
The QTc is less than 450 ms in 95% of normal males, and less than 460 ms in 95% of normal females. LQTS is suggested if the QTc is longer than these cutoffs. However, as 5% of normal people also fall into this category, some suggest cutoffs of 470 and 480 ms for males and females respectively, corresponding with the 99th centiles of normal values.
The value for a normal QT interval is similar in males and females from birth up to adolescence. During infancy, a normal QTc is defined as 400 ± 20 milliseconds. Before puberty, the 99th percentile of QTc values is 460 milliseconds. After puberty, this value increases to 470 milliseconds in males and 480 milliseconds in females. [citation needed]
Prior to administration of the first dose, the corrected QT (QTc) must be determined. If the QTc is greater than 440 msec (or 500 msec in patients with ventricular conduction abnormalities), dofetilide is contraindicated. If heart rate is less than 60 bpm, the uncorrected QT interval should be used. After each subsequent dose of dofetilide, QTc ...
[12]: 03:17 When Ahgren had to take bathroom or sleep breaks from the stream, his moderators would entertain the stream by talking, watching videos, and playing movies. [7] [11] [4] Once, Ahgren showered on camera while wearing shorts. [11] [9] Ahgren's roommates and QTCinderella made stream appearances at times. [4]
IP cameras or network cameras are digital video cameras, plus an embedded video server having an IP address, capable of streaming the video (and sometimes, even audio). [3] Because network cameras are embedded devices, and do not need to output an analogue signal, resolutions higher than closed-circuit television 'CCTV' analogue cameras are ...
The Flip Video Ultra camera. A pocket video camera is a tapeless camcorder that is small enough to be carried in one's pocket.. A typical pocket video camera has an LCD screen of at least 1.5", the ability to capture either only standard video or both standard video and high-definition video (H.264/MPEG-4 AVC), at least 128MB of internal memory and a Secure Digital (SD) card extension or at ...
Some cameras include dedicated tally lights built into their bodies. In that case, the camera typically provides an input terminal for controlling the indicator. The common interfaces are SDI, Ethernet, USB, and HDMI (the latter's main role is outputting the video signal, but it can also accept a number of control commands).