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Coronary angioplasty early after diagnosis of unstable angina
Insights
Percutaneous coronary angioplasty (PTCA) effectively treats selected unstable angina patients after initial medical stabilization. This procedure shows an acceptable complication rate and excellent 1-year outcomes, with most patients remaining symptom-free.
Area of Science:
- Cardiology
- Interventional Cardiology
Background:
- Unstable angina requires effective treatment strategies.
- Persistent exertional angina after medical therapy indicates a need for further intervention.
- Patient selection is crucial for successful percutaneous coronary angioplasty (PTCA).
Purpose of the Study:
- To evaluate the efficacy and safety of early PTCA in patients with unstable angina.
- To assess the 1-year clinical outcomes and prognosis following PTCA for unstable angina.
Main Methods:
- PTCA was performed in 71 patients with unstable angina who responded to initial pharmacologic treatment but had persistent symptoms.
- Patients predominantly had single-vessel disease and preserved left ventricular function.
- Follow-up included clinical assessment, exercise testing, and thallium scintigraphy at 12 months.
Main Results:
- PTCA success rate was 87%, with no procedure-related deaths.
- Myocardial infarction occurred in 10% during the procedure and 11% by 1 year.
- Recurrence of angina was 25%, restenosis was 25%, and revascularization was needed in 25% of patients within 1 year.
- 70% demonstrated improved cardiac function, and 91% were symptom-free at 1 year.
Conclusions:
- Early PTCA is an effective treatment for selected patients with unstable angina.
- The procedure has an acceptable complication rate and offers an excellent 1-year prognosis.
- PTCA improves cardiac function and symptom relief in a majority of patients.
Abstract:
Coronary angioplasty (PTCA) was performed early after diagnosis of unstable angina in 71 patients who responded favorably with initial pharmacologic treatment and who also had persistent exertional angina. The patients selected for PTCA had predominantly single-vessel disease and a normal or slightly abnormal left ventricular function. PTCA was successful in 87% (62/71) of the patients and unsuccessful in 13% (9/71). There were no deaths related to PTCA. The incidence of myocardial infarction during the procedure was 10% (seven of the 71 patients). Urgent bypass surgery was necessary in 11% (eight of 71 patients) of the patients. All patients were followed up for 12 months. There was one late death and one late nonfatal myocardial infarction. During 12 months of follow-up there was recurrence of angina pectoris in 25% of the patients (14/62). The restenosis rate was 25% (13/52) in the patients with an initial successful PTCA who underwent repeat angiography. Improved cardiac functional status after sustained successful PTCA was demonstrated by the normal exercise capacity on bicycle exercise testing and the absence of ischemia on thallium 201 scintigraphy studies in 70% of the patients. At the 1-year follow-up visit after attempted coronary angioplasty in all 71 patients, the total incidence of deaths was 1.5% (one patient), myocardial infarction 11% (eight patients), and the need for revascularization 25% (emergency surgery eight patients, late surgery three patients, and repeat PTCA seven patients); 91% (64 of 70 patients) were symptom free. It is concluded that PTCA in selected patients with unstable angina initially stabilized with medical treatment is an effective treatment with an acceptable complication rate and an excellent 1-year prognosis.