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Aim: was to assess the consistency of measurements of anatomic and functional parameters performed with EchoCG and MRI and to determine the possibility of MRI to visualize the coaptation of valve leaflets after reconstruction of the aortic valve (AV) using the Ozaki technique.

Material and methods: the study included 124 patients who underwent MRI of the heart anc transthoracic EchoCG, 9,3±4,0 days after the Ozaki operation. With EchoCG and MRI, EDV and LV EF were calculated. Dopplerography determined the area of AV opening and the transaortal pressure gradient. At MRI, the area of AV opening was planetically measured, and the transoortal pressure gradient was calculated from results of phase contrast study To assess the consistency of measurement results, the Blend-Altman method was used.

Results: mean values obtained with EchoCG and MRI were statistically significantly different (p<0,001) only when measuring LV EDV The greatest accordance between measurements of EchoCG and MRI was observed in the evaluation of the transaortal pressure gradient (0,04±3,7 mm Hg). Less coordinated were measurements of the opening area of AV (0,22±0,79 cm2) and LV EF (0,22±8,9%). Less consistency was in measurement of EDV (26,4±33,0 ml). The mean value of the difference was statistically significantly different from zero when measuring the opening area of AV (p=0,180) and the transaortal pressure gradient (p=0,120). The article presents 5 clinical examples of visual evaluation of leaflets coaptation after AV reconstruction by the Ozaki method.

Conclusions: differences in consistency in the assessment of the opening area of the AV and the transaortal pressure gradient in echocardiography and MRI are not clinically significant, indicating that these measurement methods can be used interchangeably after AV reconstruction using the Ozaki technique.

Results of measurements of EDV size and LV EF in EchoCG and MRI are less consistent and not interchangeable, therefore, measurement results should be interpreted in the context of the specific method

MRI should be a part of the diagnostic algorithm after Ozaki surgery, but its use in the early postoperative period may be limited to cases of poor quality or inconsistent Echocardiography



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