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[Improvement of left ventricular function after fibrinolysis using intravenous streptokinase]
Insights
This study found that non-surgical treatment improved left ventricular function in patients recovering from myocardial infarction. Specifically, akinesis decreased significantly, indicating improved heart muscle movement post-heart attack.
Area of Science:
- Cardiology
- Cardiovascular Medicine
- Interventional Cardiology
Context:
- Myocardial infarction (MI) is a leading cause of heart failure.
- Early reperfusion therapy aims to limit infarct size and preserve left ventricular function.
- Assessing the long-term impact of treatment strategies on cardiac recovery is crucial.
Purpose:
- To evaluate the impact of different post-myocardial infarction treatments on left ventricular function.
- To assess changes in akinesis and stroke volume in patients treated medically versus surgically.
- To determine if arterial revascularization improves cardiac function recovery after MI.
Summary:
- This study followed 33 male patients post-myocardial infarction treated with fibrinolytic agents.
- Coronary angiography guided treatment: angioplasty, bypass, or medical management.
- In non-surgical patients, significant improvement in akinesis and segmental kinetics was observed 8 months post-MI, particularly in inferior necrosis cases.
Impact:
- Medical management and arterial revascularization show potential for improving left ventricular function post-MI.
- Findings suggest that interventions aimed at restoring blood flow can lead to significant cardiac recovery.
- Further research with larger populations is needed to confirm these benefits, especially for anterior necrosis.
Abstract:
Over a period of 13 months, 33 male patients, under the age of 72 years, admitted in the cardiology department following a myocardial infarction within 5 hours after painful onset, and treated with intravenous fibrinolytic agents, were included in this study. A coronary angiography with right anterior oblique ventriculography at 30 degrees was performed. Within the first 72 hours. The informations provided by this examination resulted in a coronary angioplasty performed in patients, a by-pass in 4 patients and medical treatment in 13 patients. After a mean delay of 8 months, a new control was performed using iodine ventriculography study of radial and segmental shortening fractions, Leighton's rotation). The results expressed, concern the sub-group of non-surgical patients: regardless of the site of the infarction, the percentage of akinesis (% AK) goes from 15.0 +/- 12.0 p. cent to 8.3 +/- 10.3 p. cent (p less than 0.01). The stroke volume (SV) is not significantly improved. In the group of inferior necroses, the global SV goes from 58.4 +/- 10.1 p. cent to 62.9 +/- 10.8 p. cent; p less than 0.05 and the % AK goes from 13.9 +/- 11.5 p. cent to 5.0 +/- 5.6 p. cent; p less than 0.001). Segmental kinetics in the inferior and infero-basal territories is significantly improved at eight months. In the anterior necrosis group, the study of the same parameters does not demonstrate any significant difference (too limited population). The imputability of the improvement of the parameters of the left ventricular function by arterial revascularization is clearly suggested by these results.