Q waves are considered abnormal or pathologic if they are:

A) greater than 0.02 seconds wide and consistently precede the R wave.
B) more than one third the overall height of the QRS complex in lead II.
C) not visible in leads I or II when the QRS gain sensitivity is increased.
D) present in a patient who is experiencing chest pressure or discomfort.

Answer: B) more than one third the overall height of the QRS complex in lead II.