Changes of Left Ventricular Geometry Shape and Left Ventricular Regional Function in Patients With Dilated Cardiomyopathy

Objectives To assess the left ventricle regional systolic and diastolic function,left ventricle geometry and left venticle sphericity indexes in patients with dilated cardiomyopathy(DCM) by quantitative tissue velocity imaging(QTVI).Methods Thirty normal subjects and 52 DCM patients underwent QTVI and colour Doppler flow imaging study in order to measure the left ventricular regional function along left ventricle apical long-axis view and the left ventricle geometry.Peak tissue velocities of left venticle regional muscular tissue during systole(Vs),systolic acceleration(a),early diastole(Ve) and left atrium contraction(Va)along left venticle apical long axis view were measured.The indexes of left ventricular regional systolic and diastolic function were mearsured at the same time.The left ventricle geometry shape was reflected from the systolic and diastolic sphericity index(Sis and Sid),the left ventricular ejection fraction(LVEF) and D wave /A wave(PVd/PVa) of pulmonary veins flowing spectrum reflected the global left ventricular systolic and diastolic function.The Vs,Ve,Va,a,PVd/PVa ratio,LVEF,Sis,Sid and their correlations between normal subjects and patients with DCM were compared and analyzed.Results Vs,Ve,Va,a,PVd/PVa,Sis and Sid in patients with DCM were lower than those in normal persons.There were significant relations between Sis and a(r = 0.6142,P< 0.05),Ve/Va and Sid(r=0.6271,P< 0.05).Conclusions QTVI offer a newer method which has a higher sensitivity and accuracy in evaluating the left venticle regional systolic and diastolic function in DCM patients.There was significant relation between regional cardiac function and left venticle sphericity.