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[Balloon dilatation in unstable angina pectoris and acute myocardial infarct]
F Schwarz1, H Tillmanns, G Schuler
1Medizinische Universitätsklinik, Abteilung für Innere Medizin III (Kardiologie, Pneumologie, Angiologie), Heidelberg.
Insights
Percutaneous transluminal coronary angioplasty (PTCA) shows similar success rates for unstable angina, acute myocardial infarction, and stable angina. Long-term outcomes depend on initial success, not patient risk factors.
Area of Science:
- Cardiology
- Interventional Cardiology
- Vascular Medicine
Background:
- Unstable angina and acute myocardial infarction represent acute coronary syndromes with significant morbidity and mortality.
- Percutaneous transluminal coronary angioplasty (PTCA) is a common intervention for coronary artery disease.
- Comparing PTCA outcomes across different angina severities is crucial for treatment guidelines.
Purpose of the Study:
- To compare the early and long-term results of PTCA in patients with unstable angina, acute myocardial infarction, and stable angina.
- To evaluate the influence of primary procedural success on outcomes in these patient groups.
- To identify factors affecting PTCA success and recurrence rates.
Main Methods:
- Retrospective analysis of 115 patients with unstable angina, 73 with acute myocardial infarction, and 213 with stable angina undergoing PTCA.
- Assessment of primary success rates and angiographic findings at follow-up (1 month for acute myocardial infarction, 6 months for others).
- Correlation of outcomes with patient demographics, risk factors (cholesterol, hypertension, diabetes, smoking), and angiographic recurrence of stenosis.
Main Results:
- Primary PTCA success rates were comparable across all three groups: 72% (unstable angina), 78% (acute myocardial infarction), and 79% (stable angina).
- Angiographic findings at follow-up were similar. However, long-term results were worse in patients with restenosis compared to those without.
- No significant differences in cholesterol levels, arterial hypertension, diabetes, or smoking habits were observed between patients with lasting success and those with recurrence.
Conclusions:
- PTCA is a viable option for patients presenting with acute symptoms of coronary heart disease, including unstable angina and acute myocardial infarction.
- The extent of primary success in PTCA is a key determinant of long-term outcomes, irrespective of the initial clinical presentation.
- Risk factor modification may not solely predict restenosis after successful PTCA; procedural success remains paramount.
Abstract:
Early results after percutaneous transluminal coronary angioplasty (PTCA) in patients with unstable angina or acute myocardial infarction were compared with those in patients with stable angina. The primary success rate in 115 patients with unstable angina was 72%, in 73 with acute myocardial infarction 78%, and in 213 with stable angina 79%, i.e. there was no difference between the three groups. In patients with acute myocardial infarction and primary successful PTCA control angiography was performed one month after PTCA, in patients with unstable and stable angina 6 months after PTCA. Angiographic findings were identical in the three groups. But the results after successful balloon dilatation were dependent on the extent of primary success: in all three groups, patients in whom the post-dilatation control angiography revealed recurrence of stenosis the primary results were worse than in those without. There was no difference between those patients with lasting success and those with recurrence as regards cholesterol level, arterial hypertension, diabetes, and smoking habits. It is concluded that in every patient with acute symptoms of coronary heart disease the indication for PTCA should be considered.