Plaque and blood vulnerability in ST segment elevation myocardial infarction patients: association between lesion morphology using intravascular ultrasound radiofrequency analysis and circulating biomarkers.

AIM The purpose of the study was to evaluate associations between iMap intravascular ultrasound tissue characterization of culprit and nonculprit lesions in infarct-related artery and plasma biomarkers during ST segment elevation myocardial infarction (STEMI) and at 10-month follow-up. METHODS AND RESULTS Sixty-three STEMI patients at the time of index hospitalization and 10-month follow-up underwent coronary angiography and intravascular ultrasound with iMap tissue characterization of the culprit artery. Proximal and culprit segments were analyzed. A higher percentage of necrotic tissue in the nonculprit segment was found in patients in the top soluble intercellular adhesion molecule 1 (sI…

Interleukin-6 gene promoter –174G/C polymorphism and insulin resistance: a pilot study

Background: The aim of this pilot study was to evaluate the relationship between interleukin-6 promoter -174G/C (IL-6 -174G/C) polymorphism and insulin resistance (IR) in obese patients with coronary heart disease (CHD). Methods: Twenty obese male patients with CHD were selected from a larger database of patients (n=606). IL-6 -174G/C genotype was previously analysed and only homozygotes with the CC genotype (n=10) or GG genotype (n=10) were selected. IR was measured using the homeostasis model assessment for IR (HOMA-IR) method. Results: Differences in age, body mass index, total cholesterol, low-density lipoprotein cholesterol, high-density lipoprotein cholesterol (HDL-C), triglyceride (T…

Tissue characteristics in non-culprit lesions during the acute coronary event and at ten months follow-up

Introduction: It is not well established how the medication recommended in the guidelines will affect plaque compositional changes in non-culprit segments after STEMI. We hypothesized that the proportion of necrotic tissue in the non-culprit lesion in the culprit artery would decrease ten months after STEMI. Methods: In 63 consecutive STEMI patients the non-culprit segment in the culprit artery was analyzed with iMap intravascular ultrasound (IVUS) at the time of the index procedure and 10 months later. The non-culprit segment was identified as being 20mm proximal to the most stenotic culprit segment. All patients were recommended to receive the drug therapy outlined in the STEMI guidelines…

Tissue characterization comparison of culprit lesions between stable coronary disease and ST elevation myocardial infarction patients