1. Silent myocardial ischemia in patients undergoing peripheral vascular surgery: Incidence and association with perioperative cardiac morbidity and mortality 
Richard L. McCann, MD, Fiona M. Clements, MD 
Journal of Vascular Surgery 
Volume 9, Issue 4, Pages (April 1989)
DOI: / (89)
Copyright © 1989 Society for Vascular Surgery and International Society for Cardiovascular Surgery, North American Chapter Terms and Conditions

2. Fig. 1
A, Occurrence of ischemia during time periods. The number of patients experiencing ischemia and the mean duration of ischemia for each phase of monitoring are shown. B, Occurrence of tachycardia over time. The duration of tachycardia in the ischemic and non-ischemic groups is compared over time. Preop, the preoperative phase from the time of monitor application until 2 hours before anesthesia; intraop, the intraoperative period beginning 2 hours before anesthesia and ending 2 hours after emergence from anesthesia; DOS, the remainder of the day of surgery after the intraoperative phase; POD 1, 2, and 3, postoperative days 1, 2, and 3.
Journal of Vascular Surgery 1989 9, DOI: ( / (89) )
Copyright © 1989 Society for Vascular Surgery and International Society for Cardiovascular Surgery, North American Chapter Terms and Conditions

3. Fig. 2
Heart rate and ST level histogram from a patient undergoing general anesthesia. The record begins at midnight on the day of surgery and ends at 2 pm on postoperative day 1. Duration of anesthesia is indicated by the arrows. Black bars indicate maximum and minimum heart rates for each 15-minute time interval. Mean heart rate is indicated by the white line. The stipled area is the area under the minimum heart rate curve for computer integration purposes. EC, spurious ST elevation caused by electrocautery interference.
Journal of Vascular Surgery 1989 9, DOI: ( / (89) )
Copyright © 1989 Society for Vascular Surgery and International Society for Cardiovascular Surgery, North American Chapter Terms and Conditions