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Left ventricular thrombosis after anterior myocardial infarction with and without thrombolytic treatment
Insights
Streptokinase treatment for anterior myocardial infarction did not prevent left ventricular thrombus formation, but the risk of embolism was low. Left ventricular segmental dysfunction emerged as a key predictor of thrombus development.
Area of Science:
- Cardiology
- Internal Medicine
- Medical Research
Background:
- Left ventricular thrombus (LVT) is a potential complication following anterior myocardial infarction (MI).
- Understanding predictors of LVT is crucial for risk stratification and management.
- The role of thrombolytic therapy, specifically streptokinase, in LVT development requires further examination.
Purpose of the Study:
- To investigate the incidence of LVT in anterior MI patients treated with or without streptokinase.
- To identify clinical and echocardiographic predictors associated with LVT development.
Main Methods:
- Prospective study of 99 consecutive anterior MI patients at Umeå University Hospital.
- Echocardiography performed within 3 days of admission and before discharge to assess LVT and left ventricular (LV) function.
- 74 patients received streptokinase treatment.
Main Results:
- LVT developed in 46% of the thrombolysis group and 40% of the non-thrombolysis group.
- No significant difference in LV segmental function was observed between groups at discharge.
- LV segmental dysfunction was identified as the strongest predictor of LVT development, alongside previous MI, peak enzyme levels, and diuretic use.
Conclusions:
- Streptokinase treatment for anterior MI does not significantly reduce the incidence of LVT.
- The risk of embolic complications from LVT in this cohort was low.
- Left ventricular segmental dysfunction is a valuable marker for assessing LVT risk, even post-thrombolysis.
Objectives:
To examine the incidence of left ventricular thrombus in patients with anterior myocardial infarction, with and without streptokinase treatment. To identify predictors of thrombus development.
Design:
Consecutive patients prospectively studied during the hospitalized period. Echocardiography was performed within 3 days of admission and before discharge.
Setting:
Umeå University Hospital, a teaching hospital in Northern Sweden.
Subjects:
Ninety-nine patients with anterior myocardial infarction of whom 74 were treated with streptokinase.
Main Outcome Measures:
Left ventricular thrombus and left ventricular segmental myocardial function.
Results:
During the hospital stay, a thrombus developed in 46% (95% confidence interval [CI], 35-57%) of the patients in the thrombolysis group and in 40% (95% CI, 21-59%) of the patients in the non-thrombolysis group. No difference in left ventricular segmental myocardial function was found between the thrombolysis and non-thrombolysis groups at hospital discharge. No embolic events were observed. The occurrence of a left ventricular thrombus at hospital discharge was significantly associated with previous myocardial infarction, peak enzyme levels, left ventricular global and segmental dysfunction and an increased dose of peroral diuretics or use of parenteral diuretics. In a multiple logistic regression model, left ventricular segmental dysfunction was the most important predictor of left ventricular thrombus.
Conclusion:
Thrombolytic treatment with streptokinase does not prevent the development of a left ventricular thrombus but the risk of embolic complications is low. The left ventricular segmental myocardial score can be used to assess the risk of thrombus development, also, after thrombolysis.