Correlation between left ventricular diastolic function and ejection fraction in dilated cardiomyopathy using magnetic resonance imaging with late gadolinium enhancement.
BACKGROUND
The distribution of left ventricular (LV) fibrosis and the percent fibrosis in patients with dilated cardiomyopathy (DCM) were evaluated using late gadolinium enhanced (LGE) MRI. Then the relation with the LV ejection fraction (EF) and deceleration time (DT), an index of diastolic function obtained using echocardiography, was investigated.


RESULTS
LGEMRI at 20 min after intravenous injection of Gd-DTPA (0.15 +/-0.03 mmol/kg) was performed in 17 patients with DCM. The distribution of the LV enhanced area and LGE rate (%) were calculated. EF, as well as E/A ratio and DT were obtained using echocardiography. LGE was observed in 15 out of 17 patients (88%) and the enhanced region appeared to represent myocardial fibrosis. The LV fibrosis was often found in the intraventricular septum (IVS), but there were no differences in its distribution. The LGE rate (%) had a correlation between cardiac magnetic resonance ejection fraction (CMREF) (Y = 51.7 - 2.1X [R(2) = 0.23, P<0.001]) and DT (Y = 162.2 +12.0X [R(2) = 0.35, P<0.001]).


CONCLUSIONS
The LV fibrosis is often found in the IVS with DCM. A correlation exists between LGE rate (%) to EF on CMR and DT on echocardiography in patients with DCM.
Nanjo
Shuji
S
Division of Cardiovascular Medicine, Department of Internal Medicine, Toho University Omori Medical Center, Tokyo, Japan. maru@pd5.so-net.ne.jp
Yoshikawa
Kohki
K
Harada
Masahiko
M
Inoue
Yusuke
Y
Namiki
Atsushi
A
Nakano
Hajime
H
Yamazaki
Junichi
J
D002311:Cardiomyopathy, Dilated / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000503:physiopathology; D003287:Contrast Media / Q000008:administration & dosage; D003971:Diastole; D015150:Echocardiography, Doppler; D005260:Female; D005355:Fibrosis; D019786:Gadolinium DTPA / Q000008:administration & dosage; D006801:Humans; D007275:Injections, Intravenous; D019028:Magnetic Resonance Imaging, Cine; D008297:Male; D008875:Middle Aged; D009206:Myocardium / Q000473:pathology; D011237:Predictive Value of Tests; D013318:Stroke Volume; D016277:Ventricular Function, Left
D003287:Contrast Media; D019786:Gadolinium DTPA