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Updated: Jul 9, 2026
Interventional Diagnostic Procedure: A Practical Guide for the Assessment of Coronary Vascular Function
Published on: March 15, 2022
Distal embolization during native vessel and vein graft coronary intervention with a vascular protection device:
Seif S El-Jack1, Pornratanarangsi Suwatchai, James T Stewart
1Green Lane Cardiovascular Unit, Auckland City Hospital, Auckland, New Zealand. seif.eljack@waitematadhb.govt.nz
Insights
Longer stent length predicts distal embolism during percutaneous coronary intervention (PCI). Distal protection devices are recommended for PCI involving long lesions to mitigate risks.
Area of Science:
- Cardiovascular Medicine
- Interventional Cardiology
- Medical Devices
Background:
- Distal thromboembolism and atheroembolism during PCI can cause myocardial necrosis and affect long-term outcomes.
- Distal protection devices aim to reduce these events, but their effectiveness varies by patient and lesion subsets.
Purpose of the Study:
- To identify clinical and angiographic predictors of distal embolism during PCI.
- To assess risk factors for distal embolism using debris retrieval from a distal-protection filter device.
Main Methods:
- 194 patients undergoing PCI with the FilterWire device were analyzed.
- Debris from the filter was graded semi-quantitatively.
- Clinical and angiographic variables were compared between patients with significant (≥1 mm) and nonsignificant debris.
Main Results:
- Significant debris was found in 55% of patients, more common in vein grafts (69%) than native vessels (48%).
- No clinical factors predicted significant debris.
- Longer stent length and final TIMI flow <3 were independent predictors of significant debris.
Conclusions:
- Longer stent length, indicative of longer lesions and higher plaque burden, predicts significant distal embolism during PCI.
- Consideration of distal vascular protection devices is advised for PCI of long lesions.
Objective:
We sought to define clinical and angiographic variables that may predict patients and lesions at increased risk for distal embolism during percutaneous intervention (PCI), as assessed by debris retrieval from a distal-protection filter device.
Background:
Distal thrombo- and atheroembolism may contribute to periprocedural myocardial necrosis during PCI, which may in turn affect long-term outcomes. Distal protection devices have been used to reduce this occurrence with variable outcomes depending on lesion and patient subsets.
Methods:
194 consecutive patients in whom the FilterWire(R) device (FW) [Boston Scientific Corp., Natick, MA] was used for native coronary vessel (n =129) or vein graft (n = 65) PCI were studied. FW debris was visually analyzed using a semi-quantitative grading score. Patients with "significant" debris (particles > or = 1 mm diameter) were compared with those with "nonsignificant" debris (no debris or particles <1 mm) with respect to clinical (age, gender, coronary disease risk factors, clinical presentation, periprocedural medications), and angiographic (vessel treated, vessel size, lesion length, lesion characteristics, angiographic thrombus and TIMI flow before and after PCI) variables.
Results:
Significant debris was retrieved in 55% of patients, more frequently from vein graft (69%) than native vessel lesions (48%, p = 0.006). No clinical characteristics predicted significant debris retrieval. Angiographic predictors of significant debris by multivariate analysis were longer stent length and final TIMI flow <3 (p = 0.009 and 0.007, respectively).
Conclusion:
Longer stent length, likely reflecting increased lesion length and plaque burden, predicted significant distal embolism during PCI in native vessel and vein graft lesions, as assessed by debris collected in a distal vascular protection device. This suggests that use of vascular protection devices should be considered during PCI of long lesions.
