Left ventricular diastolic dysfunction was observed after repair of coarctation of the aorta (COA) before development of left ventricular concentric hypertrophy. In this study, eighteen patients with successful repair of aortic coarctation were included and compared with seventeen age and sex matched control group. Cases were classified according to type of coarctation repair into two groups: The 1st group included cases with successful surgical repair of aortic coarctation and contained twelve patients, The 2nd group included cases with successful repair of aortic coarctation by balloon angioplasty and contained six patients. Clinical examination and echocardiography (M-mode, Pulsed Wave Doppler and tissue Doppler techniques) were done to the two groups and then the surgically managed group was compared to the catheter managed group.Results: Analysis of mitral annulus velocities including E', A', S' wave velocities, E'/A' ratio and E/E′ ratio revealed worsening of the left ventricular diastolic mechanics in the post COA repair cases (surgically managed and catheter managed) compared to healthy controls. The E' wave velocity (at the left ventricular lateral wall) was significantly lower in post COA repair cases compared with controls (p value 0.001), S' wave velocity (at the left ventricular lateral wall) was significantly lower in post COA repair cases compared with controls (p value 0.003), E'/A' ratio was significantly lower in post COA repair cases compared with controls (p value 0.03). The E/E′ ratio was significantly higher in the post COA repair cases compared to the control group (p value 0.006) with no significant difference in these parameters between the surgically managed and catheter managed groups. Significant positive correlation was found between the left ventricular mass index and age at time of intervention(r= 0.495; p= 0.037) and pressure gradient across coarctation before intervention(r= 0.57; p= 0.014)Significant negative correlation was found between E/E' ratio and duration of time after intervention(r= -0.496; p=0.036) and systolic blood pressure of the right upper limb(r= -0.558; p= 0.016)