Impact of glycemic status on left ventricular systolic function in patients with acute coronary syndrome

Abstract

Background: Diabetes mellitus DM and left ventricular systolic dysfunction LVSD commonly coexist; increasing morbidity and mortality among patients. The aim of this study is to detect the correlation between the glycemic status of patients presenting by acute coronary syndrome ACS and left ventricular global and regional systolic function. Method: The study included 510 patients presenting by ACS and referred for coronary angiography. In addition to routine laboratory tests, Glycated hemoglobin HbA1C level, as a marker of chronic glycemic status, was measured. Every patient was subjected to transthoracic echocardiographic study with accurate evaluation of left ventricular systolic function by both m-mode and biplane Simpson's method, in addition to calculation of regional wall motion score index RWMSI . The whole study population was divided into two groups; diabetic and non-diabetic based on cutoff point of HbA1C value 6.5%. The non-diabetic group was subdivided into two groups; high risk and low risk based on cutoff point of HbA1C value 5.7% Results: Sixty four percent of the studied population had DM. The mean HbA1C level was 7.6 ± 2.2%. The mean left ventricular ejection fraction LVEF was 54 ± 11 and mean RWMSI was 1.3 ± 0.3. There was significant negative correlation between the HbA1C level and the LVEF r = -0.101, p