To evaluate possibilities of rapid differential diagnosis and risk stratification in patients urgently admitted to the CCU with a suspected acute coronary syndrome without persistent ST-segment elevation (NSTEACS).

Single centre prospective non-randomised non-comparative study of patients delivered by ambulance and admitted to the CCU with suspected NSTEACS.

Aims of this study are:

1. To characterize the contingent of patients admitted to the CCU with suspected NSTEACS.
2. To evaluate possibilities of fast differential diagnosis and risk stratification in patients admitted to the CCU with suspected NSTEACS using clinical data, ECG, biomarker levels (hsTn, NT-proBNP, hsCPR, cardiac FABP) as well as HEART, ADAPT, EDACS, T-MACS, GRACE, ACTION and TIMI scores.
3. To evaluate the correlation between clinical data, ECG, biomarker levels (hsTn, NT-proBNP, hsCPR, cardiac FABP) as well as HEART, ADAPT, EDACS, T-MACS, GRACE, ACTION and TIMI scores with presence and severity of coronary atherosclerosis in patients admitted to the CCU (intensive care unit) with suspected NSTEACS.

Inclusion Criteria:

1. Delivered by ambulance to the CCU with suspected diagnosis "acute coronary syndrome (ACS)".
2. Signed informed consent.

Exclusion Criteria:

1. ACS with persistent ST-segment elevation.
2. Moribund; extremely severe condition on admission with a potentially unfavourable prognosis (cardiogenic shock, coma, cardiac arrest, an urgent need for mechanical ventilation).
3. Overt non-cardiac cause of clinical manifestations at the time of admission (bleeding, pulmonary embolism, aortic dissection, stroke).

Patients delivered by ambulance and admitted to the CCU with suspected diagnosis "acute coronary syndrome (ACS)".