THE NORMAL VALUE OF
DOPPLER TISSUE IMAGE (DTI) AND THE USAGE IN DILATED CARDIOMYOPATHY(DCM) IN
CHILDREN
MA P-R, LI G-M, Wang Y
Shandong
Provincial Hospital, Jinan, China
Objective: To realize the normal value of DTI and the usage in childen
with DCM.
Methods: The movement velocity of mitral valve ring (MVR), left
ventricular posterior wall (LVPW), Cardiac apex (CA) and interventricular
septum (IVS) were measured by DTI in 203 normal children from newborn to 14
years of age and the other cardiac function such as ejection fraction (EF),
shortening fraction (SF), cardiac index (CI) and stroke index (SI) were
also measured in children with DCM.
Results: The normal value of DTI have five rules: 1. The velocity is
increase with age. 2. The velocity is not influenced by heart rate. 3. The
velocity of endocardial muscle is faster then that of exocardial muscle
stage. 4. The velocity in diastolic stage is faster than that of systolic
stage. 5. The velocity of the muscle of LVPW is faster then that of the CA.
The velocity of the musle of CA is faster then that of IVS. The results of
DTI and Dopple echocardiography exam of 40 cases with DCM showed that early
diastolic velocity of MVR decreased in 100%, endocardial muscle diastolic
velocity of LVPW decreased in 85%. EF decreased in 32.5%, FS decreased in
27.5%
Conclusion: The normal value of DTI was determined. The 5 rules of the
influence factor of DTI were found. The DTI changes were more sensitive and
reliable than other function test in patient with DCM.