Related Experiment Videos
Delayed coronary occlusion following primary successful angioplasty: management and outcome
A Schuchert1, C W Hamm, P Kalmar
1Abteilung Kardiologie, Universitäts-Krankenhaus Eppendorf, Hamburg.
Insights
Delayed coronary occlusion after percutaneous transluminal coronary angioplasty (PTCA) is rare but challenging. Mechanical recanalization effectively reopened vessels in most cases, preventing myocardial infarction in half of the patients.
Area of Science:
- Cardiology
- Interventional Cardiology
- Vascular Medicine
Background:
- Delayed coronary occlusion following successful percutaneous transluminal coronary angioplasty (PTCA) presents treatment challenges, particularly when surgical backup is unavailable.
- This complication, occurring between 30 and 180 minutes post-PTCA, is infrequent, affecting approximately 0.9% of patients.
Purpose of the Study:
- To evaluate therapeutic strategies and patient outcomes for delayed coronary occlusion after successful PTCA.
- To identify risk factors and optimal management for this rare post-procedural event.
Main Methods:
- Retrospective analysis of 2065 patients undergoing PTCA, identifying 18 cases (0.9%) with delayed coronary occlusion.
- Assessment of interventions including mechanical recanalization, intravenous thrombolysis, and emergency surgery.
- Evaluation of clinical presentation, time to intervention, and subsequent cardiac events, including myocardial infarction.
Main Results:
- Delayed occlusion occurred in 18 patients (mean age 61 years, 14 male), predominantly involving the left descending artery (11 patients) and often associated with unstable or postinfarction angina (12 patients).
- Mechanical recanalization was successful in most patients (16/18) returning to the catheterization lab, with 50% overall prevention of myocardial infarction.
- Four patients required bypass surgery due to impending reocclusion, and nine developed myocardial infarction.
Conclusions:
- Delayed coronary occlusion post-PTCA is a rare complication, predominantly seen in patients with unstable angina.
- Mechanical recanalization is an effective primary treatment for delayed coronary occlusion, significantly improving outcomes.
- Prompt intervention is crucial to prevent myocardial infarction and manage reocclusion events.
Abstract:
The treatment of delayed coronary occlusion after primary successful percutaneous transluminal coronary angioplasty (PTCA) is more difficult because surgical standby is often not available. The purpose of this study was to assess the therapeutic approaches and outcome of patients with delayed coronary occlusion from 30 to 180 minutes after successful PTCA. A delayed occlusion occurred in 18 (0.9%) (61 +/- 11 years; male n = 14, female n = 4) out of 2065 consecutive patients after PTCA. In 11 patients the dilated stenoses were located in the left descending artery, while seven patients had the stenosis in the right coronary artery. Twelve patients had unstable or postinfarction angina. The time interval between completion of PTCA and the onset of chest pain was 64 +/- 39 minutes. Immediate i.v. nitroglycerin resulted in no relief of the symptoms in any patient. One patient was operated upon at once, and one was given i.v. thrombolysis resulting in pain relief and reversal of ECG changes. The remaining 16 patients returned initially to the catheterization laboratory, where the occluded vessels were opened by mechanical recanalization. Three of them remained in stable condition. Due to impending reocclusion surgery was necessary in four patients and thrombolysis was performed in nine. After thrombolysis the vessel remained open in four patients. The other five needed bypass surgery on the day of PTCA. Myocardial infarction developed in nine patients (maximal CK 673 +/- 488 units/l). In conclusion, delayed occlusion after successful PTCA is a rare complication occurring primarily in patients with unstable angina. Mechanical recanalization opened the occluded vessel in most patients, and myocardial infarction was prevented in 50%.