To assess blood flow using the MR 4D Flow in patients with aortic coarctation in the late postoperative period.

MRI of the heart was performed in 10 patients (7 boys and 3 girls), mean age 9.6+1.8 years who underwent resection of aortic coarctation with an end-to-end anastomosis between the ages of 2 weeks and 10 months (4.3+3.6 months). At the time of the MRI, all patients were at the next stage of dynamic observation, in a stable state, without drug treatment. Data processing of blood flow assessment was carried out "of-line" using 4D Flow package of the fourth version. Blood flow parameters were used...

A flow change with acceleration and loss of the signal in the region of minimal residual aortic narrowing, local and extended was detected in all patients in systole (Fig. 1). In four patients, an additional vortex flow was observed below the aortic narrowing area, a spiral flow in the descending aorta, which persisted throughout diastole (Fig. 2). Moreover, these patients had increased blood fow in the anastomosis throughout the diastole. The gradient on the aortic isthmus, obtained by calculating 4D Flow MRI and standard 2D...

MR 4D Flow allows retrospective investigate the bloodstream, including its geometry, in detail under natural conditions in combination with an MR-assessment of the overall functional parameters of the heart and the presence of fibrotic changes in the myocardium.

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