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2014, vol. 8, br. 1, str. 36-44
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Upoređivanje gradijenata pritisaka dobijenih računanjem sa gradijentima pritiska dobijenih kateterizacijom kod pacijenata koji imaju suženje aortnog zaliska
Comparison of the pressure gradients obtained by calculation with the pressure gradients obtained by catheterization in patients with aortic valve stenosis
Sažetak
Ovaj rad prikazuje rezultate izračunavanja gradijenta pritiska na mestu aortne stenoze kod pacijenata koji imaju suženje aortnog zaliska. Gradijenti pritiska dobijeni računanjem su upoređeni sa gradijentima pritiska dobijenih kateterizacijom kod 12 pacijenata sa dijagnostikovanim suženjem aortnog zaliska. Došlo se do zaključka da maksimalni faktor separacije utiče na maksimalnu brzinu protoka krvi (p<0.05), što je korišćeno u izračunavanju gradijenta pritiska. Nije bilo statistički značajne razlike u pritiscima dobijenih računanjem i pritiscima donijenih kateterizacijom (p<0.05). Ovi rezultati su u skladu sa širokom upotrebom Doppler ehokardiografije u praksi kao zameni za invazivne metode za određivanje stepena aortne stenoze. Metoda Doppler ehokardiografije zasniva se na izračunavanju koje je prikazano o ovom radu.
Abstract
This paper presents calculation of the pressure gradient at the point of aortic stenosis in patients with valvular aortic stenosis. The pressure gradients obtained by calculation were compared with the pressure gradients measured using catheterization in 12 patients with valvular aortic stenosis. It has been found that the maximum separation factor influences the maximum blood flow velocity (p<0.05), which was used in calculation of the pressure gradient. There were no statistically significant differences in the pressures obtained by calculation and the pressures obtained by catheterization (p<0.05). These results are in compliance with the widespread use of Doppler echocardiography in practice as a substitute for invasive methods for determining the degree of aortic stenosis. The Doppler echocardiography method is based on calculation presented in this paper.
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