Related Experiment Videos
Failure of early electrocardiogram to predict successful thrombolysis. Effect of stunned myocardium?
Insights
The modified Selvester QRS score effectively predicts reperfusion after acute myocardial infarction treatment at six weeks. Early electrocardiogram scores did not predict reperfusion or improved heart function.
Area of Science:
- Cardiology
- Medical Imaging
- Biomarkers
Background:
- Acute myocardial infarction (AMI) requires timely reperfusion therapy.
- Assessing reperfusion success is crucial for patient outcomes.
- Electrocardiogram (ECG) changes can indicate myocardial damage and recovery.
Purpose of the Study:
- To evaluate the modified Selvester QRS score's utility in predicting successful reperfusion following streptokinase treatment for AMI.
- To compare early (1-week) and late (6-week) QRS scores in relation to thrombolytic therapy success.
Main Methods:
- Prospective study of 74 AMI patients treated with intravenous streptokinase.
- Thrombolytic therapy success determined by coronary angiography and creatine kinase (CK) peak time.
- Modified Selvester QRS score assessed at 1 week and 6 weeks post-treatment.
- Left ventricular ejection fraction (LVEF) measured at 1 week.
Main Results:
- A significant difference in the 6-week QRS score was observed between patients with successful reperfusion and those without.
- No significant difference in the 1-week QRS score was found between the reperfusion and non-reperfusion groups.
- Mean LVEF at 1 week was 60% in the successful reperfusion group and 51% in the non-reperfusion group.
Conclusions:
- The modified Selvester QRS score is a valuable predictor of reperfusion success at 6 weeks after AMI treatment.
- Early ECG assessment (1 week) using the QRS score is insufficient for predicting reperfusion or improved left ventricular function.
- Stunned myocardium may explain the delayed correlation between early ECG findings and functional recovery.
Abstract:
We investigated the value of the modified Selvester QRS score in predicting reperfusion in 74 patients with an acute myocardial infarction who were treated with intravenous streptokinase. Coronary angiography and time to peak creatine kinase level were used to determine the success of thrombolytic therapy. At 6 weeks a significant difference was seen between the QRS score of the patients in whom thrombolysis was successful compared with those in whom there was no reperfusion. There was, however, no difference between the QRS score of these groups of patients at 1 week. The ejection fraction at 1 week was 60% and 51%, respectively. The failure of the early electrocardiogram to predict reperfusion and improved left ventricular function may be a consequence of the stunned myocardium.