The Impact of Early Diastolic Myocardial Relaxation on the other Parameters of Diastolic Function and Association of Tissue Doppler Parameters of Diastolic Function with Diabetes Compensation and Duration in Type 2 Diabetic Patients

摘要

This study assessed the impact of tissue Doppler derived myocardial early diastolic relaxation velocity (Em) on the other parameters of diastolic function (preload dependent transmitral early diastolic velocity [E], tissue Doppler derived myocardial late diastolic velocity [Am], preload dependent transmitral late diastolic velocity [A]) and evaluated the correlation of these parameters with selected clinical variables in type 2 diabetic patients. Using tissue Doppler echocardiography, 82 type 2 diabetic patients were evaluated, divided into two equal groups of Em < 7.5 cm/s or ≥ 7.5 cm/s. Patients with Em < 7.5 cm/s had significantly lower E/A and Em/Am, and higher E/Em values. Multilinear regression showed a negative correlation between Em and glycated haemoglobin (HbA1c) and duration of diabetes, a negative correlation of Em/Am with age, duration of diabetes and HbA1c, and a positive correlation of E/Em with age, duration of diabetes and use of diuretics. The E/A ratio only correlated negatively with age. It is concluded that Em is a reliable parameter of diastolic function, and that the tissue Doppler parameters of diastolic function are associated with diabetes compensation and diabetes duration.