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GS-4CH: global strain rate on apical four chamber image, BSA: body surface area, IHD: ischemic heart disease, WBC: white blood cell, BUN: blood urea nitrogen, NT-proBNP: N-terminal-pro B-type natriuretic peptide, LVEF: left ventricular ejection fraction, LVEDD: left ventricular end-diastolic diameter, LVESD: left ventricular end-systolic diameter
