[Evaluation of the Q wave in leads II, III, and aVF. I. Deviation of the electrical axis of the heart, ischemic heart disease].

The authors present a brief account of data reported in the recent literature on the evaluation of the Q wave in leads, II, III, aVF in clinically healthy subjects and in patients with ischaemic heart disease, in particular in conjunction with focal myocardial lesions. A marked Q wave in these leads is not necessarily a manifestation of clinical disease (it may be due to a changed position of the electric axis of the heart) and conversely the absence of the Q wave in leads II, III, aVF does not imply clinical absence of disease (most frequently a low myocardial infarction)...