Which artery is associated with STEMI in leads V1-V3, aVL, and I?

The association of STEMI (ST-Elevation Myocardial Infarction) in leads V1-V3, aVL, and I is primarily indicative of the involvement of the left anterior descending artery (LAD). Leads V1-V3 represent the anterior wall of the heart, while lead I and aVL represent the high lateral wall. When the LAD is occluded, it compromises blood flow to these areas, which is why the ST-segment elevation is noted in these leads.

The LAD supplies a significant portion of the left ventricle, especially the anterior wall and the septum. STEMI in this territory suggests that the anterior wall is experiencing ischemia due to the blockage of blood flow in the artery. This pattern is typical for a significant proximal occlusion in the LAD, leading to the corresponding electrocardiographic changes seen in these leads.

Other arteries listed, such as the right coronary artery and left circumflex artery, primarily supply different regions of the heart, and their occlusion typically leads to ST-elevation changes in other leads. The pulmonary artery is not associated with myocardial ischemia as it is primarily involved in the circulation of blood to the lungs, making it irrelevant in this context.