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[Invasive treatment of recent myocardial infarction. Evaluation of left ventricular function]
A Derkacz1, B Borkowski, S Pasyk
1Wojewódzkiego Ośrodka Kardiologii, Zabrzu.
Insights
Early reperfusion therapy in acute myocardial infarction significantly improves left ventricular ejection fraction (EF). Successful artery recanalization, especially within 3 hours, enhances EF more than angioplasty, while LVEDP is not a reliable indicator.
Area of Science:
- Cardiology
- Interventional Cardiology
Context:
- Acute myocardial infarction (AMI) poses a significant threat to left ventricular function.
- Intracoronary thrombolysis and angioplasty are critical interventions for AMI.
- Assessing hemodynamic parameters is crucial for evaluating treatment efficacy.
Purpose:
- To evaluate the impact of intracoronary thrombolysis and subsequent coronary artery patency on left ventricular function in AMI patients.
- To determine the correlation between reperfusion timing and left ventricular ejection fraction (EF).
- To assess the utility of left ventricular end-diastolic pressure (LVEDP) in estimating left ventricular function post-AMI.
Summary:
- Hemodynamic parameters were assessed in 179 AMI patients treated with early intracoronary thrombolysis.
- Reperfusion was achieved in 67.6% of patients, correlating with a significant increase in EF.
- A patent infarct-related artery and early reperfusion (within 3 hours) were associated with greater EF improvement, independent of coronary angioplasty. LVEDP was found to be an unreliable measure of ventricular function.
Impact:
- Early reperfusion therapy is vital for preserving and improving left ventricular function after AMI.
- The timing of reperfusion significantly influences long-term cardiac outcomes.
- This study highlights the importance of timely interventions to optimize recovery of ejection fraction in myocardial infarction patients.
Abstract:
Hemodynamic parameters of left ventricular function were assessed in 179 patients with acute myocardial infarction, who were treated with intracoronary thrombolysis during first six hours after the onset of chest pain. Some of them were subjected to coronary angioplasty. Patency of the infarct related artery was controlled between the 2nd and 3rd week after acute myocardial infarction concomitant with evaluation of EF and LVEDP. Reperfusion of the infarct related artery was obtained in 121 patients (67.6%) and also significant increase of EF was observed in those patients. EF rose in patients with a patent coronary artery after 2-3 weeks (not significant) in contrast to patients with obstructed coronary artery in whom there was a fall in EF. The rise of EF was more pronounced in patients with reperfusion reached in 3 hours after the onset of infarct pain and without coronary angioplasty. It was shown that LVEDP is not usefull in estimation of left ventricular function.