Traumatic vertebral artery injury is a rare, life-threatening injury that has been increasingly managed with endovascular intervention. However, an antegrade endovascular approach alone can fail to occlude traumatic pseudoaneurysms (PSAs) and arteriovenous fistulas (AVFs), requiring high-risk surgical re...
Antegrade In Situ Fenestration During Thoracic Endovascular Aortic Repair for Preserving Isolated Left Vertebral Artery Introduction An isolated left vertebral artery (ILVA) on the aortic arch with aortic arch pathologies is common, but how to preserve the ILVA blood flow during endovascular repair ...
Results were a right internal carotid artery (RICA) peak systolic velocity of 196 cm/sec with an end diastolic velocity of 90 cm/sec, indicating a 50鈥 75% stenosis, left internal carotid artery (LICA) occlusion, and antegrade flow of bilateral vertebral arteries. Bilateral blood pressures had...
Artery, subclavianArtery, vertebralWe present an unusual radiographic manifestation of subclavian steal seen in six patients. These cases differ from the classic form of subclavian steal in that antegrade and bidirectional blood flow in the vertebral-subclavian artery system is seen, resulting in the ...
Objectives Retrograde vertebral artery flow, the steal phenomenon, is most frequently caused by a flow鈥恖imiting stenosis of the proximal subclavian artery. The reversal of flow can be incomplete, resulting in bidirectional flow: retrograde in systole and antegrade in diastole. Less often, ...
PTA under the flow-reversal protection using Mo.MA Ultra was performed electively, and the VAOS and antegrade flow of the right vertebral artery (VA) improved. Conclusion: In EVT for symptomatic VAOS, lesion cross for distal protection device placement is considered to create a high risk of ...
Duplex imaging of the right VA revealed antegrade flow with monophasic, low-resistance Doppler signals (0.913 m/sec) and no turbulence. The left VA was visualized, but color could not be elicited. Proximal Doppler signals were blunted with no diastolic flow (0.329 m/sec), and no signal ...
Patient 4 was treated by PTA and stent placement into the subclavian artery. Antegrade flow in all four LITAs could be achieved resulting in immediate relief from angina pectoris and cerebral symptoms. Patients 1 and 3 showed no further symptoms with equal BP of the upper extremities and ...
Pulse Doppler waveforms of the LVA were also classified into 5 subtypes depending on the depth of the mid-systolic notch representing retrograde blood flow (normal, mid-systolic notch, retrograde flow smaller than antegrade flow, retrograde flow larger than antegrade flow, retrograde flow without ...
Surgical procedures which restored antegrade vertebral artery flow did not necessarily improve symptoms of posterior circulation ischemia. In some patients improvement in posterior circulation symptoms was noted following carotid endarterectomy. It is concluded that retrograde flow in the vertebral artery is,...