Identification of Carotid Plague Vulnerability by Contrast Enhanced Ultrasound: Correlation With Plague Histopathology

Beijing Tsinghua Chang Gung Hospital

Status: Completed

Conditions: Carotid Artery Plaque; Ultrasonic Diagnosis

Study type: Observational

Funder types: Other

Identifiers

NCT02820207

（2016）003

Details and patient eligibility

About

OBJECTIVE/BACKGROUND: Intraplaque neovascularization is one of the most important risk factors for unstable carotid plaque. This study was designed to evaluate whether carotid intraplaque neovascularization (IPN) can be accurately assessed by contrast enhanced ultrasound (CEUS).

METHODS: Preoperative CEUS analysis of 50 carotid artery stenosis patients would be compared to histopathology performed on their plaques excised by carotid endarterectomy (CEA) with CD34 and MMP9 staining.

Full description

1. To enroll 50 cases of patients suffering from carotid artery stenosis continuously, the investigators perform contrast enhanced ultrasound on patients for identifying the vulnerable plagues and taking high resolution MR inspection to analysis those plagues at the same time.
2. All patients undergo carotid endarterectomy. The vulnerable ingredients of carotid plaques such as intraplaque neovascularization and bleeding are identified by pathological examination and immunohistochemical staining.
3. To evaluate the accuracy of CEUS for identifying carotid vulnerable plague compared with high resolution MR.
4. The investigators divide patients into the stable group and the vulnerable group based on the results of CEUS inspection. To analysis the incidence of postoperative complications such as stroke and mortality within 30 days and to compare the differences between the two groups.

Enrollment: 50 patients

Sex: All

Ages: 50 to 80 years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• The patients with ischemic symptom whose carotid stenosis were more than 50%
• The patients without ischemic symptom whose carotid stenosis were more than 70%

Exclusion criteria

• Confirmed with severe intracranial vascular lesions
• Suffering from the large area cerebral infarction or critical stroke sequela
• Restenosis after CEA or CAS
• Suffering from severe coronary heart disease, respiratory failure,the hypertension difficult to controled
• Patients with malignant tumor or expected life < 2 years

Trial design

50 participants in 1 patient group

Vulnerable plague

Description:

The patients suffering from carotid artery stenosis were identified as the vulnerable plague group by Contrast Enhanced Ultrasound whose plagues were found intraplaque neovascularization