Effects of aortic valve diseases on pressure profiles in selected locations of the human arterial system

Marcin Majka,

Giacomo Gadda,

Angelo Taibi,

Piotr Zieliński

Abstrakt

Zwężenie zastawki aortalnej (stenosis ostii arteriosi sinistri) oraz niedomykalność zastawki aortalnej (insufficientia valvulae aortae) są najczęstszymi chorobami zastawek serca. Zmiany chorobowe zastawki niewątpliwie wpływają na obieg krwi w całym układzie tętniczym. Wpływ tych zmian zbadano przy użyciu jednowymiarowego modelu, w którym każdy segment tętnicy transmituje tylko jeden mod fali tętna. Opracowane odpowiednie wartości współczynnika odbicia zastawki aortalnej oraz kształt ciśnienia generowanego przy skurczu serca symulują realistycznie działanie zastawki zdrowej i chorej. Otrzymane wyniki pozwalają przewidywać przebiegi ciśnienia w najistotniejszych miejscach drzewa tętniczego. Zadziwiający jest fakt, że nawet najmniejsze różnice w współczynniku odbicia od zastawki powodują znaczące zmiany w profilach ciśnienia, a w szczególności w aorcie wstępującej, lewej tętnicy ramiennej oraz w tętnicy łączącej przedniej

Słowa kluczowe: model tętniczy , chory zastawki aortalnej, zwężenie zastawki aortalnej, niedomykalność zastawki aortalnej, linia transmisyjna, przebiegi ciśnienia, koło Willisa
References

 

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