A patient with simultaneous anterior and inferior ST-segment elevation after percutaneous coronary intervention

Area of Science:

• Cardiology
• Medical Imaging
• Electrocardiography

Background:

• Acute myocardial infarction (MI) requires precise diagnosis for timely intervention.
• Right ventricular (RV) involvement in MI can present complex electrocardiographic (ECG) findings.
• ST-segment elevation (STE) myocardial infarction necessitates differentiation between anterior and inferior wall involvement.

Observation:

• A patient presented with inferior-right ventricular (RV) ST-segment elevation (STE) myocardial infarction (MI).
• Coronary angiography revealed mid-right coronary artery (RCA) occlusion and proximal left anterior descending (LAD) artery stenoses.
• Post-stent angioplasty of the RCA, new STE emerged in ECG leads V1-V6.

Findings:

• Standard STE pattern recognition was misleading in this case.
• ECG analysis utilizing vector concepts successfully excluded anterior MI due to LAD occlusion.
• The RV origin of the observed ECG picture was recognized, correlating with RV dilation.

Implications:

• Vector concepts in ECG analysis are crucial for accurate diagnosis of complex myocardial infarction presentations.
• Understanding ECG "capture" of RV dilation is key to interpreting atypical STE patterns.
• This case underscores the diagnostic power of detailed ECG analysis beyond simple pattern recognition in acute coronary syndromes.