Vectorcardiographic features of acute right ventricular infarction

Area of Science:

• Cardiology
• Diagnostic Imaging

Background:

• Acute myocardial infarction can involve the right ventricle (RV).
• Accurate diagnosis of RV infarction is crucial for patient management.

Purpose of the Study:

• To evaluate the utility of vectorcardiography in diagnosing acute right ventricular infarction.
• To identify specific vectorcardiographic criteria for RV involvement in myocardial infarction.

Main Methods:

• Studied seven patients with confirmed acute inferior or inferior-posterior transmural myocardial infarction and RV involvement.
• Utilized serial vectorcardiographic tracings with the Frank lead reference system.
• Analyzed ST vector magnitude and direction in the horizontal plane and spatial octants.

Main Results:

• In acute inferior and RV infarction, ST vector magnitude ≥ 0.15 mV pointed right-anteriorly or right-posteriorly.
• Spatial ST vector direction changes were observed in inferior and RV infarction.
• Larger rightward ST vector magnitude, particularly right-anterior, correlated with higher probability of RV infarction.
• In acute inferior-posterior and RV infarction, ST vector magnitude ≥ 0.2 mV pointed to the right-posterior-inferior octant without significant directional change.

Conclusions:

• Vectorcardiography is a promising non-invasive, economical, and non-polluting diagnostic tool.
• Specific vectorcardiographic patterns can identify acute RV infarction.
• Vectorcardiography may become a primary diagnostic test for acute RV infarction.