[Left ventricular radial and longitudinal systolic function derived from magnetic resonance imaging in hypertrophic cardiomyopathy patients].
OBJECTIVE
To evaluate the left ventricular (LV) radial and longitudinal systolic function in hypertrophic cardiomyopathy (HCM) patients by 3.0 T MR.


METHODS
Sixteen HCM (HCM group) and twenty normal adults (normal group) were examined with fast imaging employing steady-state (FIESTA) acquisition sequence of cardiac MRI. LV ejection fraction (LVEF), longitudinal shortening (LS) and fractional shortening (FS) in three standard levels were measured to analyze LV radial and longitudinal systolic function.


RESULTS
Asymmetric hypertrophy was detected in all HCM patients. The LVEF and FS were significantly higher while LS was significantly lower in HCM group than those in normal group (P < 0.05 or 0.01). FS at basal and middle levels were significantly higher in HCM group than in normal group (both P < 0.01). FS in apex level was similar in the two groups (P = 0.057). Pearson correlation analysis showed that LS was negatively related with the number of hypertrophy segments in HCM patients (r = -0.537, P = 0.032). But there was no correlation between FS and the number of hypertrophy segments as well as FS and LS in HCM patients (r = -0.090, P = 0.739; r = 0.049, P = 0.856).


CONCLUSIONS
The LV longitudinal systolic function was reduced but the LV radial systolic function remained unchanged in HCM patients, thus, LS changes could better reflect myocardial systolic function in HCM patients.
Department of Imaging and Nuclear Medicine,Ningxia Medical University, Yinchuan 750004, China.
Lisha
L
Mu
Wenling
W
Li
Email: zhuli72@163.com.
Li
L
Zhu
Xingcang
X
Tian
Kai
K
Su
Yulin
Y
Guo
Yanjun
Y
Pu
D000328:Adult; D002312:Cardiomyopathy, Hypertrophic / Q000503:physiopathology*; D006352:Heart Ventricles; D006801:Humans; D008279:Magnetic Resonance Imaging; D009206:Myocardium; D013599:Systole; D018487:Ventricular Dysfunction, Left; D016277:Ventricular Function, Left