Postoperative myocardial ischaemia in patients with recent myocardial infarction.

Fifteen patients (10 men and five women; mean age 67.3 yr) with a history of a recent (less than 1 yr) myocardial infarction underwent ambulatory ECG monitoring for 5 days after non-cardiac surgery. The duration, number and severity of ischaemic episodes were maximal within the first 12 h after surgery and again on the 3rd day after operation. The difference in the duration of ischaemic episodes between the 2nd and 3rd days after operation was statistically significant (P less than 0.05). There were no perioperative myocardial infarctions and all patients were discharged from hospital.