1. Gylten, Darin MA, CES, CSCS
  2. Lounsbury, Patricia RNC, MEd, CCRN
  3. Gordon, Ellen E. I. MD

Article Content


ST segment depression is seen in the post coronary artery bypass graft (CABG) patient during Phase II cardiac rehabilitation (CR), but its significance is unclear and there is a paucity of information about it in the literature. We hypothesized that ischemic ECG signs are not uncommon in this patient population, but unlike other populations in CR, a revision in medical management (RMM) as a result of the finding is not likely.



To assess the presence of ischemic electrocardiographic (ECG) signs in post CABG patients and to determine if RMM as a result of the finding is as common as it is with other patients.



From January 2000, RMM have been tracked on all patients in CR; to date 618 patients (71% male) are available for analysis. ECG ischemia is defined as ST segment depression of >=1 mm 80 msec after the J-point with normal QRS complex. Eighty-six subjects were eliminated because of QRS abnormalities resulting in 532 subjects for analysis.



Of the eligible subjects, 137 (25.75%) underwent CABG. Of those 17 (12.4%) showed ECG ischemia at least once during CR compared with 76 (19.2%) of all others. Additional testing or hospitalization with re-catheterization occurred for 2.5% and 4.1% respectively for the non-CABG patients and 0% and 2.2% respectively for the CABG patients.



During Phase II CR, ECG signs suggestive of ischemia occur in 12.4% of patients with CABG and 19.2% of all other patients. Additional testing or hospitalization with re-catheterization is rare for the patient who underwent CABG.