A 54-year-old presents with 3 hours of non-exertional chest discomfort. ECG is nonischemic. Initial high-sensitivity troponin is normal. HEART score is 2. What is the most appropriate next step?AUse a structured clinical decision pathway with serial high-sensitivity troponins to rule out MIBImmediate stress testing before repeat biomarkersCAdminister fibrinolytic therapyDAdmit for invasive coronary angiographyEDischarge without further evaluationCheck my answer