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[Coronary permeability and left ventricular function following thrombolytic therapy]
J Suárez de Lezo1, A Medina, M Pan
1Hospital Nuestra Señora del Pino, Las Palmas.
Insights
Early thrombolytic therapy for acute myocardial infarction significantly improves coronary artery patency and reperfusion. Recanalized patients showed better recovery of heart muscle function and left ventricular performance.
Area of Science:
- Cardiology
- Interventional Cardiology
Context:
- Acute myocardial infarction (AMI) is a leading cause of mortality.
- Early reperfusion therapy is critical for improving outcomes.
- Thrombolytic agents are a key treatment modality for AMI.
Purpose:
- To evaluate the angiographic outcomes and functional recovery in patients with acute myocardial infarction treated with thrombolytic therapy.
- To assess the impact of early reperfusion on infarct-related artery patency and myocardial function.
Summary:
- Forty patients (mean age 55 years) with AMI received thrombolytic therapy (streptokinase or rt-PA).
- Angiography at baseline, 3 hours, 24 hours, and before discharge revealed infarct-related artery patency in 78% at 24 hours.
- Early reperfusion occurred in 57% of patients, with reduced intraluminal thrombus and improved TIMI coronary perfusion grade over time.
Impact:
- Recanalization was associated with significantly better regional wall motion recovery in infarct zones compared to non-reperfused patients.
- Improved left ventricular functional recovery was observed in patients with antegrade collateral flow to the infarct area.
Abstract:
We study 40 patients, 55 +/- 7 years old with acute myocardial infarction treated early by thrombolytic therapy (20 STK and 20 rt-PA). All patients were angiographically studied in the following conditions: 1) baseline, before initiating therapy. 2) Three hours after treatment. 3) Twenty four hours later. 4) Before discharge. The infarct related artery was patent 24 hours after treatment in 31 patients (78%); five of them were patent before treatment, and we observed an early reperfusion in 20 patients (57%) and late reperfusion in 6 patients (17%). The number of patients with angiographic evidence of intraluminal thrombus decreased progressively through conditions while the grade TIMI of coronary perfusion increased in the absence of reocclusion. Final regional wall motion of infarct related myocardial zones and their degree of recovery were significantly higher in recanalized patients, as compared with non-reperfused patients. Similarly, left ventricular functional recovery was higher in patients with antegrade of collateral flow to the infarct area, as compared with totally occluded patients.