What is a lateral infarction?
A lateral myocardial infarction (MI) is a heart attack or cessation of blood flow to the heart muscle that involves the inferior side of the heart. Inferior MI results from the total occlusion of the left circumflex artery. Lateral MI is characterized by ST elevation on the electrocardiogram (EKG) in leads I and aVL.
What causes lateral infarct?
Isolated lateral wall myocardial infarction (LMI), similar to other acute myocardial infarctions (MI), is caused by acute atherosclerotic plaque rupture with subsequent thrombus formation in the left circumflex (LCx) coronary artery or one of its branches.
What is a lateral infarct age undetermined?
If the finding on an ECG is “septal infarct, age undetermined,” it means that the patient possibly had a heart attack at an undetermined time in the past. A second test is typically taken to confirm the finding, because the results may instead be due to incorrect placement of electrodes on the chest during the exam.
What are the lateral leads on ECG?
The septum is represented on the ECG by leads V1 and V2, whereas the lateral wall is represented by leads V5, V6, lead I and lead aVL. To make things more complicated, sometimes the LAD “wraps around” the cardiac apex, which is a common anatomic variant.
What does high lateral infarct mean?
INTRODUCTION. High lateral ST-segment elevation myocardial infarction. (STEMI) is a pattern of ST-segment elevation caused by acute occlusion of the first diagonal branch (D1) of the left anterior descending coronary artery (LAD-D1).
What is an anterior lateral infarction?
Lateral infarction. Definition: Infarction in distribution of “diagonal” or “marginal” coronary artery (distribution of LCX), involving primarily basal & middle sectors of anterior-superior/lateral LV quadrant; “lateral” quadrant previously called “posterior” or “posterior-lateral” quadrant.
What causes an infarction of the lateral wall?
Infarction of the lateral wall usually occurs as part of a larger territory infarction, e.g. anterolateral STEMI. Isolated lateral STEMI is less common, but may be produced by occlusion of smaller branch arteries that supply the lateral wall, e.g. the first diagonal branch (D1) of the LAD,…
What causes ST elevation in lateral infarction?
Isolated lateral infarction due to occlusion of smaller branch arteries such as the D1, OM or ramus intermedius. ST elevation is present in the high lateral leads (I and aVL). There is also subtle ST elevation with hyperacute T waves in V5-6.
How to prevent anteroseptal infarcts?
Anteroseptal infarct diet. Maintaining a healthy diet and getting enough exercise is one of the best ways to reduce anteroseptal infarcts. Reducing the amount of high cholesterol food like meat and dairy as well as other animal products can go a long way in promoting cardiovascular health as you get older.