Lead definition

  Classically

      Lateral leads :
V5 and V6.

      High lateral leads :
I and aVL.

  Observation of
q / Q waves or negative T waves in these leads suggest the diagnosis of

     
OLD myocardial infarction.

  In daily clinical practice, many patients show extension of the ischemic changes

      into the neighbouring regions. Additionally, the treatment strategies do not differ for both.

      Therefore, differentiation between lateral and high lateral myocardial infarctions may not be so necessary

      in daily clinical practice.





ECG 1. The ECG above, belongs to a 57 years old male who had lateral myocardial infarction 2 months ago due to occlusion of
the diagonal branch of the LAD coronary artery. The
QS pattern in leads C5, C6 and the qr pattern in leads I and aVL show
OLD LATERAL myocardial infarction. When the abocve ECG was recorded, the patient had neither angina nor elevated
cardiac enzymes.

Click here for a more detailed ECG