Acute Coronary Syndrome Clinical Trial
Official title:
A 2A Receptor (A2 AR) as a Novel Biomarkers for Physician Decision-making Improvement Evaluation's Patients With Suspected Acute Coronary Syndrome But Negative Troponin.
One proposed strategy is the stratification of troponin-negative patients with biomarker testing at presentation to facilitate the clinically-appropriate rapid discharge from the emergency department of patients who present with low-intermediate risk chest pain, and conversely to triage appropriate Non sustained ST elevation acute coronary syndrome (NSTE-ACS) patients to Cardiology beds, stress and non-invasive imaging modalities. Biomarkers such as high-sensitivity troponin (hs-cTn), heart-type fatty acid-binding protein (H-FABP), CRP, brain natriuretic peptide (BNP); and copeptin and ischemia-modified albumin are an important advance for diagnostic testing for ACS (4). Regarding novel biomarker testing at presentation, the addition of these biomarkers demonstrated increased sensitivity at an acceptable QALY threshold, but more evidence is needed (5,6). A reliable method for the diagnosis of minimal cardiac ischemia would meet a strong demand for the sensitive diagnosis of coronary artery disease in patients with chest pain but unremarkable ECGs and biomarkers. Adenosine is an endogenous nucleoside cardioprotective agent. Its cardiovascular effects are mediated throught the activation of A2A Receptor (A2 AR) and play a major role in the regulation of Coronary flow CF. As altered coronary blood flow occurs in patients with CAD, it has been showed that that A2AR expression and functional activity play a role in CAD. In a previous studies the team have developped an agonist-like monoclonal antibody to study expression level of this receptor and their functional activity. Recently , Gariboldi demonstrated that measuring the expression level of A2AR on peripheral blood mononuclear cells ( PBMC) represents a good tool to address in situ expression in coronary tissues of CAD patients.
In the diagnostic setting of ACS, expression and functionnaly activity of A2AR could be a sensitive detection method for ischemia. It would be a powerful tool for risk stratification of patients presenting with chest pain but unremarkable ECG and blood tests. the investigateors therefore designed a blind multicentrique prospective study to evaluate expression and functionnaly activity of A2AR in the management of undifferentiated chest pain The objective of the study was to evaluate diagnostic accuracy between this novel biomarkers A2AR and invasive and non -invasive evaluation of patients with suspected coronary artery disease (CAD). ;
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