03 sec and/or amplitude ≥25% of the R-wave amplitude. Pathological Q-waves must exist in at least two anatomically contiguous leads (i.e neighboring leads, such as aVF and III, or V4 and V5) in order to reflect an actual morphological abnormality. The existence of pathological Q-waves ...
The T wave is even more susceptible to a variety of influences than the ST segment and thus is less reliable as a marker of pathological or physiological derangement since the majority of T-wave abnormalities are nonspecific. The T-wave axis in the frontal plane may differ from the QRS axis...