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[Complications of percutaneous transluminal coronary angioplasty (PTCA)]
M Dabrowski1, J Jodkowski, A Witkowski
1II Samodzielnej Pracowni Hemodynamicznej Instytutu Kardiologii, Warszawie.
Insights
Percutaneous transluminal coronary angioplasty (PTCA) had a 6.9% major complication rate, including death and myocardial infarction. Risk factors for PTCA complications include lesion morphology and patient condition.
Area of Science:
- Cardiology
- Interventional Cardiology
- Vascular Medicine
Background:
- Percutaneous transluminal coronary angioplasty (PTCA) is a common procedure for coronary artery disease.
- Understanding in-hospital complications and their predictors is crucial for patient safety and procedural optimization.
Purpose of the Study:
- To analyze the incidence of major in-hospital complications following PTCA.
- To identify risk factors associated with PTCA-related complications, including occlusion and dissection.
Main Methods:
- Retrospective analysis of 756 PTCA procedures performed between 1981 and 1990.
- Detailed review of patient data, procedural outcomes, and in-hospital complications.
- Statistical analysis to identify correlations between patient/lesion characteristics and adverse events.
Main Results:
- A 6.9% major in-hospital complication rate was observed, with mortality at 0.66% and myocardial infarction at 1.66%.
- Periprocedural occlusion occurred in 1.5% of cases, often requiring bypass surgery or pharmacological management.
- Risk factors for dissection included long lesions, eccentric stenosis, tortuosity, and side branch origin. Large jeopardized myocardium increased the risk of abrupt vessel closure and hemodynamic collapse.
Conclusions:
- PTCA is a relatively safe procedure, but significant complications can occur.
- Patient factors like unstable angina and lesion characteristics like complexity and length are associated with higher risks.
- Identifying high-risk patients and lesion morphologies can guide procedural strategy and potentially reduce adverse outcomes.
Abstract:
Between 1981 and 1990, 714 patients underwent 756 percutaneous transluminal coronary angioplasty (PTCA) procedures. A total of 52 patients (6.9%) had major in-hospital complications: 5 patients (0.66%) died, Q-wave or non Q-wave myocardial infarction were observed in 13 patients (1.66%) during procedure and in 8 (1%) outside the catheterization laboratory, before discharge. Because of periprocedural occlusion 11 patients (1.5%) were managed with bypass surgery, 8 (1%) had a transient occlusion that was reopened with PTCA. 21 patients (2.8%) were not ++re-dilated but managed pharmacologically. Dissection, intracoronary thrombus and previous thrombolytic treatment were often associated with occlusion. The risk of dissection was related to lesion morphology. Long-(more than 1 cm) lesion, eccentric stenosis and tortuosity of the vessel segment undergoing dilatation were risk factors for occlusive dissection. There was a high risk of side branch occlusion if its take-off was narrowed and side branch originated from the target lesion. One of the most important risk predictors is the amount of jeopardized myocardium supplied by the target coronary artery. Acute closure of an artery supplying large amount of myocardium may cause abrupt hemodynamic collapse. Hypotension secondary to the artery occlusion may cause a decrease of the flow in the other coronary arteries, leading to cardiogenic shock. Although it is important to note that patients with unstable angina, intracoronary thrombus, long and complex lesion, severe multivessel disease and compromised left ventricular function are at higher risk of acute complication, PTCA is a relatively safe procedure.(ABSTRACT TRUNCATED AT 250 WORDS)