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Acute coronary events associated with percutaneous transluminal coronary angioplasty
Insights
Acute coronary events, including myocardial infarction and prolonged angina, occurred in 13.6% of patients undergoing percutaneous transluminal coronary angioplasty (PTCA). Higher operator experience reduced event rates for some complications.
Area of Science:
- Cardiology
- Interventional Cardiology
- Public Health
Background:
- Percutaneous transluminal coronary angioplasty (PTCA) is a common procedure for coronary artery disease.
- Understanding the incidence and predictors of acute coronary events during PTCA is crucial for patient safety and procedural improvement.
Purpose of the Study:
- To analyze the incidence and types of acute coronary events in patients undergoing PTCA.
- To identify clinical and angiographic predictors of these events.
- To assess the impact of operator experience on event rates.
Main Methods:
- Analysis of data from 3,079 patients enrolled in the NHLBI PTCA Registry across 105 centers.
- Categorization of events into coronary vascular events (dissection, occlusion, spasm, embolism, perforation, rupture) and ischemic events (myocardial infarction, prolonged angina).
- Evaluation of major complications (myocardial infarction, emergency surgery, death) associated with these events.
Main Results:
- Acute coronary events occurred in 13.6% of patients; prolonged angina (6.8%) and myocardial infarction (5.5%) were most frequent.
- Dissection and occlusion were associated with high rates of major complications (>80%), while isolated coronary spasm (18%) and prolonged angina (35%) had lower rates.
- Coronary events were more frequent in women and patients with unstable angina; eccentric lesions increased risk, while single discrete lesions decreased it. Operator experience reduced rates of overall events, MI, prolonged angina, and spasm.
Conclusions:
- The study identified key predictors of acute coronary events during PTCA, including patient factors and lesion characteristics.
- Increasing operator experience is associated with a reduced incidence of several important PTCA-related complications.
- These findings can inform strategies to improve patient outcomes and procedural safety in PTCA.
Abstract:
Acute coronary events reported in patients enrolled in the NHLBI PTCA Registry were analyzed. Data were collected on 3,079 patients from 105 contributing centers. Coronary vascular events (dissection, occlusion, spasm, embolism, perforation or rupture) or ischemic events (MI or prolonged angina) occurred in 418 patients (13.6%). Major complications (MI), emergency surgery or death) occurred in 280 patients (67%) with acute coronary events. The most frequent events were prolonged angina, which occurred in 211 (6.8%), and MI, in 170 (5.5%). Coronary dissection, occlusion and spasm each occurred in approximately 5% of patients. Coronary embolism, perforation and rupture were rare (less than 0.2% for each). Dissection and occlusion each had a high frequency (greater than 80%) of associated major complications. A substantially lower incidence of major complications occurred in patients with isolated coronary spasm (18%) or prolonged angina (35%). Clinical and angiographic predictors for overall and specific events were identified. Coronary events occurred more frequently in women and patients with unstable angina. Eccentric lesions were associated with a higher rate of coronary events, and event rates were lower with single discrete lesions than with other types of lesions. The frequency of any coronary event, MI, prolonged angina and coronary spasm each decreased with increasing experience with PTCA. The frequency of dissection and occlusion did not change with experience.