What is the characteristic feature of an EKG showing a Lateral wall infarction?

The characteristic feature of an EKG showing a lateral wall infarction is ST elevation in leads I and aVL. Lateral wall infarctions typically occur due to occlusion of the left circumflex artery, which supplies blood to the lateral aspects of the left ventricle.

In this context, leads I and aVL are positioned to view the lateral wall of the heart, so elevation in these leads indicates that the area is experiencing acute ischemia or infarction. The presence of ST elevation here suggests an ongoing process where the myocardial tissue is being damaged due to inadequate blood supply.

Understanding the specific leads correlated with different regions of the heart is essential for accurately diagnosing types of myocardial infarctions. This is why option B correctly identifies the EKG findings associated with a lateral wall infarction.