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Does length or eccentricity of coronary stenoses influence the outcome of transluminal dilatation?
Insights
Lesion length did not impact percutaneous transluminal coronary angioplasty (PTCA) outcomes. However, eccentric lesions increased PTCA failure rates, highlighting lesion characteristics as key risk factors.
Area of Science:
- Cardiology
- Interventional Cardiology
- Vascular Biology
Background:
- Percutaneous transluminal coronary angioplasty (PTCA) is a common procedure for treating coronary artery disease.
- Lesion characteristics, such as length and eccentricity, may influence PTCA success and complication rates.
Purpose of the Study:
- To investigate the impact of coronary lesion length and eccentricity on the outcomes of a first percutaneous transluminal coronary angioplasty (PTCA).
Main Methods:
- Analysis of 526 patients undergoing a first single native vessel PTCA.
- Comparison of outcomes (complications, primary success, lumen diameter gain, distal pressure) between long vs. short and eccentric vs. concentric stenoses.
Main Results:
- Long stenoses showed no significant difference in complications or hemodynamic outcomes compared to short stenoses.
- Eccentric stenoses had a lower primary success rate (80%) than concentric stenoses (89%), primarily due to difficulty crossing the lesion.
- Combined long and eccentric lesions had the highest complication rate (24%), while short and concentric lesions had the lowest (12%).
- Hemodynamic outcomes were comparable regardless of lesion morphology, suggesting technical factors are crucial.
Conclusions:
- Lesion eccentricity is a significant risk factor for PTCA failure, whereas lesion length has a lesser impact.
- While lesion characteristics pose risks, technical skill and advanced equipment can help overcome these challenges.
- Understanding lesion morphology is vital for optimizing PTCA procedural success and patient outcomes.
Abstract:
In 526 patients undergoing a first percutaneous transluminal coronary angioplasty (PTCA) of a single native vessel, we studied the influence of length and eccentricity of the lesion on complications and primary success. Long stenoses (greater than or equal to 5 mm, n = 153) did not differ from short stenoses (less than or equal to 4 mm, n = 265) in terms of overall complications or gain in lumen diameter and distal pressure. Eccentric stenoses (n = 155) showed a lower rate of primary success than concentric stenoses (n = 338) (80% vs 89%, p less than 0.05). Inability to cross the stenosis was the main reason for failure. Stenoses that were long and eccentric (n = 51) had the highest incidence of complications (24%) and stenoses that were short and concentric (n = 177) the lowest (12%, p less than 0.05). However, the average outcome expressed by gain in lumen diameter and distal pressure was equal in both groups and is obviously more dependent on technical factors than on anatomy. Nevertheless, length and, particularly, eccentricity of a lesion constitute risk factors for PTCA. They may be overcome by technical skill and sophisticated equipment, such as steerable catheters.