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Thrombus aspiration catheter is a Dottering balloon
D Sheshagiri Rao1, Ramachandra Barik1, Akula Siva Prasad1
1Department of Cardiology, Nizam's Institute of Medical Sciences, Hyderabad 500082, Telengana, India.
Insights
Thrombus aspiration during percutaneous coronary intervention (PCI) for ST-elevation myocardial infarction (STEMI) may unexpectedly worsen distal embolization. This technique might push more thrombus distally than it effectively removes, challenging current practices.
Area of Science:
- Cardiology
- Interventional Cardiology
- Vascular Medicine
Background:
- ST-elevation myocardial infarction (STEMI) management often involves percutaneous coronary intervention (PCI) to restore blood flow.
- Thrombus aspiration is a technique used during PCI to remove blood clots.
- Delayed presentation in STEMI can lead to larger thrombi and increased risk of distal embolization.
Observation:
- A patient with STEMI and subtotal left anterior descending (LAD) artery occlusion presented with ongoing chest pain.
- Despite multiple thrombus aspiration attempts, no visible thrombus was retrieved.
- Post-aspiration angiography revealed complete distal embolization of the thrombus.
Findings:
- Thrombus aspiration, contrary to expectations, may facilitate rather than prevent distal embolization.
- The aspiration process itself could be responsible for dislodging and propelling thrombus fragments distally.
- This phenomenon raises questions about the efficacy and potential adverse effects of routine thrombus aspiration in specific STEMI cases.
Implications:
- Clinical practice guidelines for STEMI may need re-evaluation regarding the role and technique of thrombus aspiration.
- Further research is warranted to understand the mechanisms of distal embolization during aspiration.
- Alternative or adjunctive strategies to thrombus aspiration should be explored to improve PCI outcomes in STEMI.
Abstract:
Coronary angiogram in a young man with history of STEMI with delayed presentation revealed subtotal occlusion of left anterior descending artery (LAD) with large thrombotic filling defect distal to the critical lesion. PCI was preferred without delay because of ongoing chest pain. Several runs of thrombus aspiration failed to detect any visible thrombus. However, the immediate angiogram after thrombus aspiration showed complete distal embolization of the thrombus which could have been achieved by Dottering or balloon dilatation. In contrary to the general perception, does thrombus aspiration push more thrombus than it can aspirate?
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