Relation of Hemoglobin A1c to myocardial acoustic densitometry and left ventricular diastolic function in patients with Type 2 diabetes mellitus and without evident heart disease.
OBJECTIVE
The aim of the study was to detect the echocardiographic sensitive indexes for prediction of the subclinical cardiac dysfunction and to evaluate the relation between Hemoglobin A1c (HbA1c) and myocardial acoustic densitometry as well as cardiac function.


METHODS
Fifty DM2 patients (48.5+/-8.6 years) without evident heart disease and 50 age- and sex-matched normal controls (47.6+/-8.8 years) were enrolled. Conventional echocardiography, tissue Doppler imaging and acoustic densitometry of both groups were measured. HbA1c of DM2 patients were determined.


RESULTS
There were no significant differences in systolic indexes between the two groups. Mean LV myocardial early diastolic velocity Em and Em/Am were lower in DM group than control group. Mean LV myocardial late diastolic velocity Am and E/Em were higher in DM group than control group. IVS-IBS% and LVPW-IBS% were higher in DM group than control group. IVS-CVIB and LVPW-CVIB were lower in DM group than control group. HbA1c was negatively correlated with E/A (gamma=-0.310, P<0.05), Em (gamma=-0.409, P<0.01), Em/Am (gamma=-0.380, P<0.01) and positively correlated with E/Em (gamma=0.488, P<0.01). Significant positive correlation was present between HbA1c and IVS-IBS% (gamma=0.679, P<0.01), LVPW-IBS% (gamma=0.666, P<0.01).


CONCLUSIONS
The diastolic dysfunction and abnormal myocardial acoustic densitometry exist before the systolic function damage in DM2 patients. Tissue Doppler imaging and ultrasonic integrated backscatter can be used as sensitive means for early assessing myocardial histological changes in DM2 patients. HbA1c is related with both diastolic dysfunction and acoustic densitometry.
Guo
Chun-Yan
CY
Department of Cardiology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, PR China.
Shen
Lu-Hua
LH
Li
Hong-Wei
HW
Teng
Yi-Xing
YX
Zhao
Shu-Mei
SM
D000328:Adult; D000368:Aged; D003720:Densitometry; D003924:Diabetes Mellitus, Type 2 / Q000097:blood / Q000503:physiopathology*; D003925:Diabetic Angiopathies / Q000097:blood / Q000503:physiopathology*; D004452:Echocardiography; D005260:Female; D006442:Glycated Hemoglobin / Q000378:metabolism*; D006331:Heart Diseases / Q000097:blood / Q000000981:diagnostic imaging / Q000503:physiopathology*; D006352:Heart Ventricles / Q000000981:diagnostic imaging / Q000503:physiopathology; D006801:Humans; D008297:Male; D008875:Middle Aged; D011237:Predictive Value of Tests; D012016:Reference Values; D018608:Ultrasonography, Doppler; D016277:Ventricular Function, Left / Q000502:physiology*
D006442:Glycated Hemoglobin