Implication of plasma intermedin levels in patients who underwent first-time diagnostic coronary angiography: a single centre, cross-sectional study (original) (raw)
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Background: Ischemia modified albumin (IMA) is an albumin that has an altered binding capacity to bind metal ions and can be used to detect myocardial ischemia in acute coronary syndrome (ACS) patients. Aim of work: To study the IMA level in patients presenting with non-ST segment elevation ACS and its diagnostic and prognostic value. Patients and methods: This study was conducted on 50 patients with a mean age of 54.7 ± 9 yrs. Patients were grouped into group 1: unstable angina (13 patients), group 2: NSTEMI (17 patients), and group 3: control group. All patients were subjected to routine labs, cardiac biomarkers and pre-discharge coronary angiography and were followed up for 2 months to detect any major adverse cardiac event. IMA level was measured upon admission for all patients. All data were statistically analyzed. Results: IMA was statistically significantly higher in groups 1 and 2 compared to group 3 patients (P value < 0.05). The optimal cutoff value to diagnose ischemic patients was 4 ng/ml. The mean IMA level was significantly cardiac biomarkers including troponin, TIMI risk score and number of the affected vessels but not correlated with the modified Gensini score (MGS), and short term prognosis. The optimal cutoff value for IMA levels to predict poor prognosis was 9.65 ng/ml. Conclusion: Serum IMA is a useful marker to rule out non ischemic patients presented with suspected ACS and is significantly related to the number of affected vessels.
Association Between IVUS Findings and Adverse Outcomes in Patients With Coronary Artery Disease
JACC: Cardiovascular Imaging, 2011
The purpose of this study was to determine whether thin-capped fibroatheromata (TCFA) identified by virtual histology intravascular ultrasound (VH-IVUS) are associated with major adverse cardiac events (MACE) on individual plaque or whole patient analysis. B A C K G R O U N D Post-mortem studies have identified TCFA as the substrate for most myocardial infarctions. However, little is known about the natural history of individual TCFA and their link with MACE. VH-IVUS provides a method of identifying plaques in vivo that are similar (although not identical) to histologically defined TCFA, and has been validated in human atherectomy and post-mortem studies. M E T H O D S One hundred seventy patients with stable angina or troponin-positive acute coronary syndrome referred for percutaneous coronary intervention (PCI) were prospectively enrolled and underwent 3-vessel VH-IVUS pre-PCI and also post-PCI in the culprit vessel. MACE consisted of death, myocardial infarction, or unplanned revascularization. R E S U L T S In all, 30,372 mm of VH-IVUS were analyzed. Eighteen MACE occurred in 16 patients over a median follow-up of 625 days (interquartile range: 463 to 990 days); 1,096 plaques were classified, and 19 lesions resulted in MACE (13 nonculprit lesions and 6 culprit lesions). Nonculprit lesion factors associated with nonrestenotic MACE included VHTCFA (hazard ratio [HR]: 7.53, p ϭ 0.038) and plaque burden Ͼ70% (HR: 8.13, p ϭ 0.011). VHTCFA (HR: 8.16, p ϭ 0.007), plaque burden Ͼ70% (HR: 7.48, p Ͻ 0.001), and minimum luminal area Ͻ4 mm 2 (HR: 2.91, p ϭ 0.036) were associated with total MACE. On patient-based analysis, the only factor associated with nonrestenotic MACE was 3-vessel noncalcified VHTCFA (HR: 1.79, p ϭ 0.004).
European Heart Journal – Cardiovascular Imaging, 2016
To evaluate the relationship between an incremental model including cardiovascular risk factors, carotid disease, and inflammatory biomarkers to predict the presence of obstructive coronary artery disease (CAD). Methods and results A total of 134 consecutive and asymptomatic intermediate-risk patients (mean age 61 + 9 years, 52% men) were enrolled. Each subject underwent circulating levels assessment of interleukin (IL)-2r, IL-6, IL-8, IL-10, high-sensitivity Creactive protein (hs-CRP) and carotid and coronary artery evaluation using carotid ultrasound and coronary computed tomography angiography (CCTA), respectively. Carotid disease was diagnosed in 71 (53%) patients. Obstructive and multi-vessel CAD were found in 50 (37%) and 18 (14%) patients, respectively. Patients in whom CCTA showed multi-vessel CAD had a higher rate of carotid disease (89 vs. 46%, P ¼ 0.001) and increased values of all interleukins when compared with patients without multi-vessel obstructive CAD. The univariate and multivariate analysis showed that male gender, diabetes, carotid disease, and IL-6 were independently associated with obstructive CAD. At receiver operating characteristic curve analysis, the multivariate model (including male gender, carotid disease, IL-6. 5.9 pg/mL, and diabetes) showed the highest area under the curve for prediction of obstructive CAD, multi-vessel CAD, and high-risk plaque defined as mixed and/or remodelled plaque when compared with all other models (P , 0.001). Conclusion Among asymptomatic intermediate-risk patients, the presence of increased IL6 levels in addition to traditional risk factors (male gender with diabetes) and carotid artery disease predicts higher rates of obstructive CAD and it could be of help to identify which subset of asymptomatic patients could be referred to CCTA for screening.
BMC Medicine, 2012
Background: More than a million diagnostic cardiac catheterizations are performed annually in the US for evaluation of coronary artery anatomy and the presence of atherosclerosis. Nearly half of these patients have no significant coronary lesions or do not require mechanical or surgical revascularization. Consequently, the ability to rule out clinically significant coronary artery disease (CAD) using low cost, low risk tests of serum biomarkers in even a small percentage of patients with normal coronary arteries could be highly beneficial. Methods: Serum from 359 symptomatic subjects referred for catheterization was interrogated for proteins involved in atherogenesis, atherosclerosis, and plaque vulnerability. Coronary angiography classified 150 patients without flow-limiting CAD who did not require percutaneous intervention (PCI) while 209 required coronary revascularization (stents, angioplasty, or coronary artery bypass graft surgery). Continuous variables were compared across the two patient groups for each analyte including calculation of false discovery rate (FDR ≤ 1%) and Q value (P value for statistical significance adjusted to ≤ 0.01). Results: Significant differences were detected in circulating proteins from patients requiring revascularization including increased apolipoprotein B100 (APO-B100), C-reactive protein (CRP), fibrinogen, vascular cell adhesion molecule 1 (VCAM-1), myeloperoxidase (MPO), resistin, osteopontin, interleukin (IL)-1β, IL-6, IL-10 and N-terminal fragment protein precursor brain natriuretic peptide (NT-pBNP) and decreased apolipoprotein A1 (APO-A1). Biomarker classification signatures comprising up to 5 analytes were identified using a tunable scoring function trained against 239 samples and validated with 120 additional samples. A total of 14 overlapping signatures classified patients without significant coronary disease (38% to 59% specificity) while maintaining 95% sensitivity for patients requiring revascularization. Osteopontin (14 times) and resistin (10 times) were most frequently represented among these diagnostic signatures. The most efficacious protein signature in validation studies comprised osteopontin (OPN), resistin, matrix metalloproteinase 7 (MMP7) and interferon γ (IFNγ) as a four-marker panel while the addition of either CRP or adiponectin (ACRP-30) yielded comparable results in five protein signatures.
2015
introduction: Coronary angiography (CA) is the gold standard test to identify patients with coronary artery disease. Despite a proportion of normal CA is expected, this study should be minimized, given its invasive nature, the associated risk and increased health costs. objectives: The aim of this study was to establish the characteristics, epidemiological patterns and variables associated to angiographically "normal" coronary arteries in stable patients referred for CA. Methods: Coronary angiographies were analyzed in 12,686 patients from five centers in Buenos Aires. All data were retrospectively obtained from 2008 to 2013. Coronary angiographies with < 50% lesions were defined as "normal". Demographic characteristics, usual risk factors, chronic renal failure, hypothyroidism, peripheral vascular disease, symptoms, ischemia-inducing tests and social coverage were compared between the group with "normal" CA and patients with ≥ 50% obstructive coronary disease. results: Among the 3,990 patients included in the study (31.5%), 38.6% had a normal CA, and female gender was the most important independent predictor for this finding. In addition, younger age and absence of ischemic symptoms were associated with greater probability of "normal" CA. Conclusions: In a population referred for CA diagnosed with stable coronary artery disease, female gender, younger age and absence of symptoms were associated with angiographically"normal" coronary arteries. Better use of clinical stratification models could optimize CA performance to detect patients with significant coronary artery disease, limiting unnecessary studies.
Utility of serum ischemia modified albumin in the early diagnosis of acute coronary syndrome
International Journal of Medicine and Public Health, 2015
Context: Coronary artery disease (CAD) is the leading cause of death. Early detection of myocardial ischemia can decrease morbidity and mortality due to CAD. Ischemia modified albumin (IMA) is a newer biomarker for early detection of myocardial ischemia in patients of acute coronary syndrome (ACS) as compared to cardiac troponin T (cTnT). Aims: The aim of this study was to test the utility of "IMA," a new biomarker of myocardial ischemia, in the early diagnosis of ACS. Settings and Design: The cross-sectional study group consisted of 101 patients between the age group of 27 and 85 years having ACS and 100 control from a healthy population. Materials and Methods: Blood was collected from all the enrolled patients immediately after admission, and samples were analyzed for cTnT on the fully automated analyzer and IMA on a spectrophotometer. Statistical Analysis Used: Statistical analysis was carried out by calculation of the area under a curve using receiver operating characteristics (ROC) curve analysis for the IMA test in the 101 patients included in the study population. Results: ROC curve area for IMA was 0.89 (95% confidence interval 0.81-0.94). At the cutoff 95 U/ml, sensitivity, and specificity were 85% and 82% and positive predictive value and negative predictive value (NPV) were 88% and 78%, respectively. Conclusions: IMA is a useful ischemic marker for diagnosis of myocardial ischemia due to high sensitivity, and it also facilitates to rule out myocardial ischemia due to high NPV.
Association between laboratory markers and presence of coronary artery disease
Biomedical papers of the Medical Faculty of the University Palacký, Olomouc, Czechoslovakia, 2010
The aim of this paper is to elucidate the relation between laboratory markers and coronary artery disease (CAD). The study involved 1254 consecutive patients with suspected or known CAD referred for coronary angiography. The blood samples including blood cell count, C-reactive protein, fibrinogen, uric acid, creatinine, and lipid spectrum were obtained after overnight fasting. One hundred and thirty-three patients were excluded due to incomplete records or inacceptable laboratory values. Differences among groups were tested with one-way ANOVA and Bonferroni post-hoc test for continuous variables and with chi-square test for categorical variables. Univariate and multivariate logistic regression was adopted for the analysis of risk factors and development of models for classification of patients into clinical categories. The linear logistic regression showed association of patient's biochemical markers with the presence of disease. Both acute and chronic CAD were associated with l...
Acute Coronary Syndromes: From the Laboratory Markers to the Coronary Vessels
Biomarker Insights, 2006
Summary A number of “interesting” risk markers have been proposed as providing prognostic informations in acute coronary syndromes (ACS). Elevation in plasma inflammatory and necrosis biomarkers have been related to future cardiovascular events in individuals with or without prior myocardial infarction. Recently BNP and pro-BNP are entered in clinical practice to recognize patients at major risk, providing incremental information respect to the traditional markers. Together with these laboratory indexes, a few of promising laboratory markers once easily available, could become usefull in identification of patients at high risk. Several studies evaluated many markers of platelet aggregation, endothelial dysfunction and vascular thrombosis, but it is not yet clear whether each of the proposed markers may provide incremental predictive information. We describe, following the most studies reported in literature, the laboratory markers with potential clinical and prognostic power that co...