What Is A Normal QTc?
What Is A Normal QTc? Regarding the 12-lead ECG, “normal” QTc values are generally considered to be between 350 and 440 ms,18 , 23 but, as will be discussed in the next section, this consideration of QTc >440 ms as indicative of “borderline QT prolongation” has probably been responsible for the greatest number of premature