A 66-year-old male patient with a high body mass index and a history of hypertension made an appointment with his primary care provider because of sudden, severe, and unprecedented fatigue over the past several days. The care provider referred the patient to the emergency department, where the patient underwent assessment for acute coronary syndrome. Assessment of the man's cardiac biomarkers revealed normal levels of myoglobin and CK-MB but elevated levels of troponin I. What conclusion is suggested by these data?