Two-Dimensional Speckle Tracking Echocardiography in Assessing the Subclinical Myocardial Dysfunction in Patients with Gestational Diabetes Mellitus

Background: Gestational diabetes mellitus(GDM) may increase the risk of cardiovascular disease, and accompany asymptomatic deterioration of the myocardial function. This study aims to identify the subclinical impact of GDM on maternal left ventricular function by two-dimensional speckle tracking echocardiography (2D-STE). Methods: We prospectively recruited 47 women with GDM and 62 healthy pregnant women who underwent transthoracic echocardiography (TTE) at 24 to 28 weeks of pregnancy.GDM diagnosis was in agreement with the IADPSG criteria. TTE was performed according to the criteria of the American Society of Echocardiography. Conventional echocardiographic data and 2D-STE parameters were compared between the two groups. Results: Age, gestational weeks, heart rate, and conventional echocardiographic parameters had no difference between the two groups.The average LV global longitudinal strain (LV-GLS) of GDM patients was lower than controls (18.14±2.53 vs. 22.36±6.33, p <0.001). The LA reservoir and conduit strain in patients with GDM were also significantly reduced (32.71±6.64 vs. 38.00±7.06, 20.41±5.69 vs. 25.56±5.73, p <0.001). However, there was no significant difference in LA contractile function between the two groups. In multiple regression analysis, LV-GLS and LA conduit strain independently associated with GDM. Conclusions: 2D-STE could detect the subclinical myocardial dysfunction more sensitively than conventional echocardiography, with LV-GLS and LA conduit strain as independent indicators of the GDM impact on maternal cardiac function during pregnancy.