• A Yazigi, F Richa, S Gebara, F Haddad, G Hayek, and M C Antakly.
• Department of Anesthesiology and Intensive Care, Hotel-Dieu de France Hospital, Saint-Joseph University, Beirut, Lebanon.
• Acta Anaesthesiol Scand. 1998 May 1; 42 (5): 532-5.

BackgroundAutomated ST-segment monitors are widely used in cardiac surgery units. The purpose of this study was to determine if cardiac morbidity and mortality, after CABG surgery, are predicted by ECG ST-segment changes on automated monitors.MethodOne hundred patients, who underwent CABG, were included in this prospective study. ST-segment deviations were recorded by an automated ST monitor, in the ICU, for 24 h after surgery. A reversible ST depression of more than 0.1 mV or a ST elevation of more than 0.2 mV and for at least 1 min were considered as significant episodes. Adverse cardiac outcomes were defined as: myocardial infarction (MI), severe left ventricular failure, ventricular fibrillation (VF) and cardiac-related death.ResultsSixty patients (group 1) presented significant episodes of ST deviation (6+/-5 episodes per patient). Forty patients (group 2) were free from ST changes. Eight patients from group 1 had postoperative adverse cardiac outcomes: 5 MI, 2 VF and 1 cardiac-related death. Patients from group 2 were all free from adverse cardiac outcomes. Automated ST-segment analysis during the first 24 h had a positive predictive value of 13% and a negative predictive value of 100%.ConclusionAutomated ST analysis is a non-invasive, sensitive and very easy-to-use monitoring system to screen patients who may develop myocardial ischemia and cardiac complications after CABG surgery.

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