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Intracoronary thrombolysis in acute myocardial infarction
Insights
Intracoronary thrombolysis successfully reopened blocked arteries in most acute myocardial infarction patients, improving heart function and reducing damage. This reperfusion therapy showed positive outcomes, though some patients still required bypass surgery.
Area of Science:
- Cardiology
- Interventional Cardiology
- Biomedical Engineering
Background:
- Acute myocardial infarction (MI) remains a leading cause of mortality worldwide.
- Timely reperfusion of occluded coronary arteries is critical for limiting infarct size and preserving left ventricular function.
- Intracoronary thrombolysis offers a direct approach to restoring blood flow in MI patients.
Purpose of the Study:
- To evaluate the efficacy and outcomes of intracoronary Thrombolysin or streptokinase infusion in patients with acute myocardial infarction.
- To assess the impact of successful reperfusion on cardiac enzyme levels, electrocardiographic changes, and ventricular function.
- To determine the association between reperfusion and the need for subsequent coronary artery bypass grafting (CABG).
Main Methods:
- Forty-seven patients with acute myocardial infarction were enrolled.
- Intracoronary infusion of Thrombolysin or streptokinase was administered.
- Coronary artery patency, arrhythmias, pain relief, ST-segment changes, creatine kinase (CK) and MB-CK levels, thallium scintigrams, and ejection fraction were monitored.
- Recommendations for coronary bypass surgery were recorded.
Main Results:
- Successful arterial reopening was achieved in 41 out of 47 patients (87%).
- Reperfusion correlated with arrhythmias, pain relief, ST-segment normalization, and new Q waves.
- Earlier peak levels of CK and MB-CK were observed.
- Serial thallium scintigrams indicated reduced defect size, and ejection fraction was higher post-reperfusion compared to controls.
- Eighteen patients were advised to undergo coronary bypass surgery due to recurrent pain or severe multivessel disease.
Conclusions:
- Intracoronary thrombolysis is an effective method for reopening occluded coronary arteries in acute myocardial infarction.
- Successful reperfusion is associated with favorable clinical and functional recovery.
- While effective, thrombolysis does not obviate the need for surgical intervention in all cases, particularly those with persistent symptoms or extensive disease.
Abstract:
Forty-seven patients with acute myocardial infarction (MI) underwent intracoronary infusion of Thrombolysin or streptokinase. In 41, a completely reoccluded artery was reopened. Patency was associated with appearance of arrhythmias, relief of pain, gradual return of the ST-segment to the baseline and appearance of abnormal Q waves. Creatine kinase (CK) and MB-CK enzyme levels peaked earlier. Serial thallium scintigrams showed reduction in defect size after reperfusion, and the ejection fraction was higher compared with control. Eighteen patients were recommended for coronary bypass surgery for recurrent pain or severe multivessel disease.