Infundibular pulmonic stenosis, poststenotic dilation of the pulmonic trunk, and proximal main pulmonary arteries were identified, as well as a mild narrowing of the descending aorta compatible with aortic stenosis.
Poststenotic dilation of the pulmonic trunk and proximal main pulmonary arteries were also noted.
Rubin, "Stenosis of the main artery supplying an organ: effect of end organ vascular compliance on the poststenotic peak systolic velocity," Journal of Medical Ultrasound, vol.
Rubin, "Stenosis of the main artery supplying an organ: effect of endorgan vascular resistance on the poststenotic peak systolic velocity in an in vitro hydraulic model at Doppler US," Radiology, vol.
Stone JR: Coarctation of the aorta with poststenotic
aneurysm in a 71-year-old man.
In patients with coronary artery obstruction, vasodilators used for hypotension may induce unfavorable intramyocardial blood flow redistribution as a consequence of vessel dilatation, resulting in regional poststenotic
hypoperfusion (the "steal" phenomenon) and possible myocardial ischemia.
1] Reversal flow begins when poststenotic
intraluminally pressure was below the basillary artery pressure.
The most frequent angiographic abnormalities are segmental constriction with poststenotic
Besides these aspects, poststenotic
dilatation after the narrowed portion of the celiac trunk is frequent (Warter et al.
Doppler ultrasound will show a focal area of color aliasing with velocities >2 m/sec, a velocity gradient between the stenotic and prestenotic segment of more than 2:1, and poststenotic
spectral broadening (Figure 13A).
An angiogram was performed which revealed mild stenosis of the left ICA at the PCOM junction with poststenotic
dilation and moderate stenosis of the right ICA at the PCOM junction with both poststenotic
dilation and irregular dilation of the right vertebral artery just distal to the posterior inferior cerebellar artery.