Color Doppler study allows you to identify and evaluate the severity of valve failure . Feed regurgitation is different from normal . failure valve leads to formation of color flow at with Niemann chamber . For example , mitral regurgitation ( MR ) is manifested at flow view at left atrium ( LP ), and aortic regurgitation ( AR ) – at LV outflow tract ( VTLZH ).
Scanning by flow length leads to arose novena large area of blood flow , and at transverse plane – to small . Accurate assessment of the area Patolo cal flow is possible only when comparing images scan of different positions and accesses . Required reject sensor by full length and width of the investigated chamber . This allows you to improve the diagnosis
eccentrically directed flows . The severity of lack of accuracy can be assessed. by penetration depth of the regurgitating flow . Negligible regurgitation limited plane of the valve , and heavy reaches dis for Basic sections studied chamber . For determining the degree of regurgitation use indicators of the area of regurgitation and her attitude to the area of the atrium . A value of less than 25% corresponds to an insignificant , from 25 to 50% – moderate and more than 50% – severe regurgitation .
Intracardiac discharge of blood
Atrial septal defect ( MPP ) leads to formation mosaic stream of of the left at right atrium ( PP ). AT connections with low flow rate he may be missed .
The defect of the interventricular septum ( IVS ) reducible dit to formation mosaic stream of of the left at right ventricle ( RV ). The width of the stream roughly corresponds to the size of the defect .
Open arterial duct leads to Figures vaniyu retrograde mosaic stream of descending aorta at pulmonary artery .