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Updated: Oct 16, 2026

Interventional Diagnostic Procedure: A Practical Guide for the Assessment of Coronary Vascular Function
Published on: March 15, 2022
Dislodgement of Intracoronary Thrombus During Angiography in a Patient with Unstable Angina Pectoris
1Department of Internal Medicine Education, Memorial Medical Center, P.O. Box 23089,Savannah, GA, 31403-3089, USA.
Insights
A rare case of unstable angina pectoris showed spontaneous thrombus release during angiography, unexpectedly improving blood flow and relieving symptoms. This unusual event highlights a unique mechanism for coronary artery recanalization.
Area of Science:
- Cardiology
- Interventional Cardiology
- Vascular Biology
Background:
- Unstable angina pectoris (UAP) is a critical condition often requiring urgent intervention.
- Intracoronary thrombus formation is a known complication and cause of myocardial ischemia.
- Spontaneous resolution of intracoronary thrombi is exceedingly rare.
Purpose of the Study:
- To report a unique case of spontaneous thrombus release during angiography in a patient with unstable angina.
- To discuss the implications of this event on coronary artery patency and ischemic symptoms.
- To review the existing literature on similar spontaneous thrombus resolution events.
Main Methods:
- Case report of a patient presenting with unstable angina pectoris.
- Diagnostic coronary angiography to visualize intracoronary lesions and thrombus.
- Observation of spontaneous thrombus fragmentation and embolization during the procedure.
- Clinical monitoring of ischemic symptoms and hemodynamic parameters post-angiography.
Main Results:
- Angiography revealed an intracoronary lesion with associated thrombus.
- During angiography, spontaneous fragmentation and release of the thrombus were observed.
- Following thrombus release, significant improvement in coronary artery patency was noted.
- The patient experienced complete resolution of ischemic symptoms post-procedure.
Conclusions:
- Spontaneous thrombus release from an intracoronary lesion can paradoxically lead to improved coronary blood flow.
- This case represents a rare instance of natural recanalization in unstable angina.
- Further investigation into the mechanisms of spontaneous thrombus resolution may offer novel therapeutic insights.
Abstract:
A patient with unstable angina pectoris in whom thrombus release from intracoronary lesion was seen during angiography is described. The event resulted in improvement of vessel patency and resolution of ischemic symptoms. To our knowledge, only two similar cases have been reported in English literature since 1966.
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