Prolonged QT means that the time between the Q and T waves in an ECG is longer than normal. It can indicate high risk of sudden cardiac death.

The QT of LQTS refers to an interval between two points (Q and T) on the common electrocardiogram (ECG, EKG) used to record the electrical activity of the heart.

It means "on the quiet," or secretly.

c=Q/v and v=IR SO C=Q/IR I=Q/T SO C=QT/QR Q CANCELS

SO C=T/R AND R MULTIPLY BY C =T SO FARAD MULTIPLY OHM =SECOND

No secretly s an adverb, secret can be an adjective eg

She has a secret friend