NPPB and acute coronary syndrome: ACS: acute coronary syndrome; AMI: acute myocardial infarction; BNP: B-type natriuretic peptide; CK: creatine kinase; CK-MB: creatine kinase-myocardial band; EF: ejection fraction; hs-TnT: high-sensitivity cardiac troponin T; MI: myocardial infarction; miRNA: microRNA; NSTEMI: non-ST elevated myocardial infarction; NT-proBNP: N-terminal pro-B-type natriuretic peptide; STEMI: ST elevated myocardial infarction; TnI: troponin I; TnT: troponin T; TTS: Takotsubo cardiomyopathy