N.B. Ivanyuk, О.J. Zharinov, К.O. Mikhalev, О.А. Еpanchintseva, B.М. Тоdurov. Changes of left ventricular ejection fraction in patients with ischemic cardiomyopathy after coronary artery bypass grafting

The aim – to establish predictors of the improvement of left ventricular (LV) systolic function after coronary artery bypass surgery (CABG) in patients with ischemic cardiomyopathy.
Material and methods. The slice single-center study analyzed data collected in the survey of 111 patients with stable coronary heart disease, decreased (less than 45 %) left ventricular ejection fraction (LVEF) and symptomatic heart failure, consecutively selected for CABG surgery. The duration of follow-up ranged from six to twelve months.
Results. Mean LVEF in patients included in the study increased from 35 % (30–39 %) to 42 % (35–45 %), on average – by 18.9 % (5.3–32.4 %). Dividing the patients into groups was performed retrospectively, depending on dynamics of the LVEF. In the first group (n=22) dynamics of LVEF was absent or negative, in the second (n=58) LVEF increased by 1–19 %, in the third (n=31) – by 20 % or more. Increase of LVEF after CABG was most notable in patients with low baseline LVEF, lesion of the left main coronary artery, and clinical manifestations of heart failure.
Conclusion. lantation of three or more grafts and concomitant tricuspid valve repair surgery were further predictors of the improvement of LVEF.

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