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Silent healing of spontaneous plaque disruption demonstrated by intracoronary ultrasound
Insights
Intracoronary ultrasound visualized plaque disruption and subsequent thrombus formation in a patient with acute myocardial infarction. This imaging technique offers insights into plaque healing and has clinical significance for patient management.
Area of Science:
- Cardiovascular Imaging
- Interventional Cardiology
- Pathophysiology of Atherosclerosis
Background:
- Acute myocardial infarction (AMI) management requires precise understanding of coronary artery pathology.
- Intracoronary imaging modalities are crucial for detailed assessment of coronary lesions.
- Distinguishing plaque rupture from dissection is critical for guiding intervention.
Observation:
- A 45-year-old patient with AMI presented with significant stenosis and apparent dissection in the right coronary artery (RCA).
- Intracoronary ultrasound (ICUS) identified the lesion as plaque disruption, not dissection.
- Post-balloon angioplasty, follow-up ICUS revealed plaque healing and resealing.
Findings:
- Intracoronary ultrasound successfully demonstrated in vivo plaque disruption and subsequent thrombus formation.
- The ruptured plaque showed evidence of resealing, appearing layered similar to thrombus.
- The flap-like lesion observed initially disappeared after intervention.
Implications:
- Intracoronary ultrasound provides valuable real-time visualization of plaque healing processes.
- Monitoring plaque disruption and healing may enhance clinical prognosis assessment.
- This technique could inform therapeutic strategies for acute coronary syndromes.
Abstract:
Intracoronary ultrasound was performed at diagnostic coronary angiography and 10 days later in a 45-year-old patient with a 3-day history of acute inferior myocardial infarction. Coronary angiography showed considerable stenosis (80%) in the distal right coronary artery (RCA) (pre the crux) and what appeared to be a dissection in the middle RCA. Intracoronary ultrasound identified this as plaque disruption. Coronary balloon angioplasty was then performed in the distal stenotic segment. Follow-up angiography 10 days after coronary intervention revealed that the flap in the lumen had disappeared. Intracoronary ultrasound imaging showed that the ruptured plaque had resealed and had the appearance of layering in the atheroma similar to thrombus formation. In summary, plaque disruption and subsequent thrombus formation can be demonstrated in vivo by intracoronary ultrasound. Monitoring this process may have important clinical significance in patient management and in assessing clinical prognosis.
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