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Percutaneous transluminal coronary angioplasty (PTCA) following thrombolysis
Insights
Percutaneous transluminal coronary angioplasty (PTCA) significantly reduces stenosis after acute myocardial infarction thrombolysis, improving coronary blood flow and patient outcomes compared to thrombolysis alone.
Area of Science:
- Cardiology
- Interventional Cardiology
- Acute Myocardial Infarction
Background:
- High-grade organic stenoses frequently remain after successful thrombolysis for acute myocardial infarction.
- These residual obstructions can impair coronary blood flow, leading to recurrent angina during rehabilitation.
- Effective management of post-thrombolysis stenosis is crucial for improving patient prognosis.
Purpose of the Study:
- To compare the efficacy of streptokinase thrombolysis alone versus streptokinase with percutaneous transluminal coronary angioplasty (PTCA) in patients with acute myocardial infarction.
- To evaluate the impact of additional PTCA on residual coronary stenosis and patient outcomes.
Main Methods:
- Prospective, controlled, randomized study involving 127 patients with acute myocardial infarction.
- Group I (64 patients): Received streptokinase thrombolysis.
- Group II (63 patients): Received streptokinase thrombolysis followed by PTCA.
- Angiographic assessment of stenosis performed at baseline and four weeks post-treatment.
Main Results:
- Both groups showed high recanalization rates after thrombolysis (Group I: 92%, Group II: 89%).
- In Group II, PTCA successfully reduced stenosis from 81.7% to 33.0% (p < 0.001 compared to Group I at 4 weeks).
- Residual stenosis at four weeks was significantly lower in the PTCA group (31.9%) versus the thrombolysis-only group (78.0%).
- Hospital mortality rates were comparable between groups, with cardiac causes predominating.
Conclusions:
- Additional percutaneous transluminal coronary angioplasty significantly reduces residual coronary stenosis after thrombolysis for acute myocardial infarction.
- PTCA offers a superior strategy for managing post-thrombolysis coronary obstructions compared to thrombolysis alone.
- This approach may improve coronary blood flow and potentially reduce long-term cardiac events.
Abstract:
After successful intracoronary and intravenous thrombolysis in acute myocardial infarction in about 90% of all cases highgrade organic stenoses of the diseased vessels can be found. These obstructions may impede coronary blood flow and be the reason for recurrent angina in the rehabilitation phase. In a prospective, controlled, randomized study with 127 patients (pts) with acute myocardial infarction 64 pts were treated with streptokinase (group I) and 63 pts were treated with streptokinase and additional PTCA procedures (group II). The patients of both groups did not differ with respect to age, distribution of sex and diseased vessels, time between onset of symptoms and start of lysis or time to maximum of CPK-curve. In group I 59 out of 64 pts had recanalized vessels (92%), in group II 56 out of 63 pts (89%). In 55/56 pts PTCA was attempted (success rate 65%) with an artificial reocclusion in two pts (4%). After four weeks in group I 47 pts were controlled angiographically. The stenosis rate did not differ between the acute phase and the control study (78.6 +/- 11.8% vs. 78.0 +/- 15.2%). Five reocclusions had occurred. In group II the resting stenosis after thrombolysis (81.7 +/- 6.6%) was diminished by PTCA to 33.0 +/- 18.2%. In the control study the remaining stenosis was 31.9 +/- 24.4%. The difference between groups I and II at the four week control was highly significant (p less than 0.001). In group I there were ten deaths during the hospital phase, nine of them of cardiac origin. In group II nine pts died, three from shock lung and five from cardiac causes.(ABSTRACT TRUNCATED AT 250 WORDS)