Thrombus Aspiration in Acute ST-elevation Myocardial Infarction (TASTI)

University of Oslo (UIO)

Status: Completed

Conditions: Acute ST-elevation Myocardial Infarction

Study type: Observational

Funder types: Other

Identifiers

NCT02746822

2015/169

Details and patient eligibility

About

Thirty patients with acute ST-elevation myocardial infarction treated with primary PCI and aspiration of thrombus material from the infarct related coronary artery will be included. Both cellular and non cellular content of the thrombus will be examined with morphological and immunohistochemical methods and related to time from onset of symptoms to PCI, as well as to the degree of myocardial necrosis. Furthermore, mRNA expression of selected signal molecules will be performed. In addition, peripheral venous blood samples will be drawn and analyzed for signalling molecules and corresponding mRNA expression in circulating leukocytes.

Full description

Observational, cross-sectional study on 30 patients with STEMI treated with thrombectomy and PCI with stent implantation. Composition and characteristics of the coronary thrombi with respect to cell types, genetic expression and presence of specific markers of inflammation, platelet activity, endothelial activation, coagulation and fibrinolysis will be investigated in relation to the levels of these markers in the general circulation, and specifically related to the time axis from symptom to PCI, as well as to the degree of myocardial necrosis.

Intracoronary thrombus will be retrieved by standard aspiration catheter, washed with saline and stored on formalin as advised by the Department of pathology, OUS Ullevål. A specific protocol for morphological and immunohistochemical methods is prepared and has been shown suitable in a pilot study on 5 patients. Assessment of coronary TIMI flow and peripheral blush grade after thrombus aspiration and PCI will be done. At the same time, peripheral venous blood will be drawn, processed and stored at -80˚C for later analyses. Demographic variables will be recorded.

Enrollment: 36 patients

Sex: All

Ages: 18 to 75 years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• Both gender
• age 18-75 years
• typical symptoms of acute myocardial infarction
• ST-elevation or presumed new left bundle branch block in the ECG
• treated with aspiration of thrombus and primary PCI in the infarct related coronary artery

Exclusion criteria

• Signs of infection
• pulmonary embolism
• chronic obstructive pulmonary disease
• arrhythmias, abnormal renal and/or liver function
• autoimmune disease
• malignant disease