Color blindness is most often a genetic visual deficiency that limits the colors that an individual can detect. Most people with this condition don't only see in black and white.The colors affected are usually limited to green and red, which often appear as shades of tan or brown.hese 10 animal facts will amaze you. Color blindness is most often a genetic visual deficiency that limits the colors that an individual can detect. Most people with this condition don't only see in black and white. The colors affected are usually limited to green and red, which often appear as shades of tan or brown.
Because of its inverse relationship to heart rate, the QT interval is routinely transformed (normalized) by means of various formulae into a heart rate independent corrected value known as the QTc interval. The QTc interval is thus intended to represent the QT interval at a standardized heart rate (essentially the QT interval at a heart rate of ...
The QT interval lasts just a fraction of a second; it normally lasts about one-third of an entire heartbeat. In people with long QT syndrome, the interval lasts longer than it should because heart muscle cells are having trouble getting ready for the next contraction. A prolonged QT interval does not cause symptoms.