The investigators will collect the blood samples from patients with suspect ACS. LTBP4 will be the first matrix protein that are going to understand. Upon hospital arrival, blood samples around 8 ml will be collected and the 2nd collection will be two weeks to one month after the event. The third collection will be one year later. In the between, if any ACS event develop, blood samples will be collected as protocols.
The project is planed to explore the impact of LTBP4 and other matrix protein and potentially related biomarkers on renal outcomes, cardiac outcomes and all-cause mortality in patients with suspected acute coronary syndrome (ACS).