[ST segment deviation in acute myocardial infarction with isolated disease of left anterior descending artery]

Area of Science:

• Cardiology
• Diagnostic Imaging
• Medical Electrography

Background:

• ST-elevation myocardial infarction (STEMI) is a critical condition often caused by left anterior descending (LAD) coronary artery occlusion.
• Accurate localization of the occluded artery is crucial for timely and effective treatment strategies.

Purpose of the Study:

• To investigate the specific electrocardiogram (ECG) characteristics associated with different occlusion sites within the LAD artery in STEMI patients.
• To determine the diagnostic utility of ECG in differentiating proximal versus medius-distal LAD occlusions.

Main Methods:

• A cohort of 170 STEMI patients with LAD occlusion confirmed by coronary angiography (CAG) were retrospectively analyzed.
• Patients were categorized into proximal LAD occlusion (n=77) and medius-distal LAD occlusion (n=93) groups.
• Standard 18-lead ECGs, recorded within 12 hours of STEMI onset, were quantitatively assessed for ST-segment deviations.

Main Results:

• Proximal LAD occlusion showed significant associations with specific ST-segment changes in leads aVL and depression in inferior leads (II, III, aVF), with varying sensitivity and specificity.
• Medius-distal LAD occlusion was characterized by the absence of ST depression in lead II and specific patterns in inferior leads, also demonstrating statistical significance.
• The study identified distinct ECG criteria for each occlusion site, with notable differences in sensitivity and specificity between the groups.

Conclusions:

• Electrocardiogram (ECG) findings are valuable in predicting the specific site of LAD occlusion in STEMI patients.
• Distinct ECG patterns can help differentiate between proximal and medius-distal LAD occlusions, supporting clinical decision-making.