High-sensitivity cardiac troponin I

Use of hs-cTnI rather than hs-cTnT may partly explain the cohort's lower PMI incidence compared with some previous studies. PMI was defined using postoperative hs-cTnI of at least 45 ng/L or a 20% rise from an already elevated baseline. Hs-cTnI primarily detects perioperative myocardial injury rather than haemodynamic stress.