Usefulness of the presenting electrocardiogram in predicting myocardial salvage with thrombolytic therapy in patients...

Area of Science:

• Cardiology
• Medical Imaging
• Biomedical Engineering

Background:

• Patients with Q waves and T-wave inversion often represent later stages of infarction.
• Predicting myocardial salvage is crucial for guiding thrombolytic therapy effectiveness.

Purpose of the Study:

• To investigate if initial electrocardiogram (ECG) parameters can predict myocardial salvageable by thrombolytic therapy.
• To assess the correlation between ECG findings and the proportion of myocardium that can be saved.

Main Methods:

• Evaluated 146 acute myocardial infarction patients undergoing angiography after streptokinase treatment.
• Assessed initial ECG parameters including Q waves, T-wave inversion, ST segment changes, and QRS score.
• Correlated ECG parameters with 90-minute angiographic findings (TIMI flow, collateral grade) and clinical data.

Main Results:

• Initial QRS score, Q wave grade, ST depression, and T-inversion grade correlated with myocardial salvage.
• TIMI flow grade at 90 minutes also showed a correlation with salvage.
• Multivariate analysis identified initial QRS score and T-inversion grade as independent predictors of myocardial salvage.

Conclusions:

• The QRS score and T-wave inversion grade on the presenting ECG are significant predictors of myocardial salvage.
• These ECG parameters can assist in patient triage for optimal thrombolytic therapy selection.