When the ST-segment is Elevated
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Leads Site of MI Coronary Artery Involved
I, aVL, V5, V6 Lateral Circumflex (CX)
II, III, aVf Inferior Right Coronary Artery (RCA)
V1, V2 Septal Left Coronary Artery (LCA)
V3, V4 Anterior Left Anterior Descending (LAD)
The patient who sustains an anterior MI and found to have a
high proximal lesion, usually has a poor outcome. A large
portion of the anterior wall of the left ventricle is affected,
thus causing pump failure. High proximal occlusion of the
left coronary artery has become known as the “widowmaker”.
The size of the MI is determined by how proximal the occlusion
is and the extent of collateral circulation to the ischemic area.
ALWAYS REMEMBER: “Time is muscle”…minutes count when
it comes to saving as much heart muscle as possible.
Make it your goal to have the shortest “door-to-balloon”
time possible.
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