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    The importance of GRACE risk score in the development of high-grade atrioventricular conduction blocks after non-st-segment elevation myocardial infarction
    (Verduci Editore s.r.l, 2023) Uyan U.; Aydin C.; Gül İ.
    OBJECTIVE: The development of high-grade atrioventricular block (HG-AVB) after acute coronary syndrome (ACS) increases morbidity and mortality rates. A significant portion of HG-AVBs resolve spontaneously after revascularization. We aimed to evaluate the power of the GRACE scoring system in predicting the development of HG-AVB and its importance in determining the need for cardiac pacemakers. PATIENTS AND METHODS: Patients who applied to our center between July 2020 and February 2023 were included in the study. 600 patients [340 (56.6%) male, mean age 65.4±13.6] without ST-segment elevation (NSTEMI) and who underwent revascularization were evaluated within the scope of the study. The heart rhythms of the patients were evaluated from the electrocardiograms (ECG) at admission. Patients with HG-AVB and other patients were divided into two groups. The heart rhythms of these patients were evaluated during their hospitalization. Then, HG-AVB patients were also divided into two groups (with and without PPM need). Demographic, laboratory, angiographic, and echocardiographic characteristics of these patients were evaluated. RESULTS: Morbidity and mortality were higher in the HG-AVB group. These patients had longer intensive care and hospital stays. The mean age, creatinine value, GRACE score (GS), total cholesterol (TC), and RCA lesion rates were higher in the HG-AVB group; hemoglobin level was found to be lower. As a result of regression analysis, RCA lesion, hemoglobin value, GRACE score, creatinine, and TC levels were predictors of HG-AVB development. In determining the need for PPM, these variables were found to be effective. ROC analysis was performed for GS, which predicted the development of HG-AVB, and the cut-off value was found to be 185.5. CONCLUSIONS: The development of HG-AVB after NSTEMI is an important health problem. By detecting these patients and those who may need PPM beforehand, various complications can be prevented, and the length of stay in the hospital can be shortened. Calculation of GS is an important parameter that can be used to predict the development and course of HG-AVB. © 2023 Verduci Editore s.r.l. All rights reserved.