Acute Careniche
An 82-year-old woman is admitted overnight with a fractured neck of femur after a fall at home. She has had no chest pain, breathlessness or palpitations. Preoperative bloods show a high-sensitivity cardiac troponin I of 68 ng/L (less than 16) and creatinine 152 micromol/L; the troponin is 70 ng/L when repeated two hours later. A result filed 14 months ago, taken when she had a urinary tract infection, was 65 ng/L. Her electrocardiogram shows sinus rhythm with no ST segment or T wave changes. Which one of the following terms best describes this troponin result?