These 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.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.
The duration of the QT-interval varies dependent upon how fast the heart is beating, but in normal healthy people, when the heart is beating 60 beats per minute, it is between 350 and 440 milliseconds.
In one literature analysis, patients were using between 2 and 1680 mg/day and the percentage of patients with prolonged QTc intervals varied from 9% to 88%. 1 ECG readings showed QTc intervals of 413-457 msec with a change from baseline of 12-42 msec. The analysis found that some studies showed a dose-dependant effect on increasing QTc interval, while others did not.