RT Journal Article SR Electronic T1 Monitoring arrhythmias and signs of intraoperative ischemia by electrocardiogram JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 32 OP 36 VO 48 IS 1 A1 White, Roger Dean YR 1981 UL http://www.ccjm.org/content/48/1/32.abstract AB