Article Figures & Data
Figures
- Fig 1.
Examples of Doppler spectra. Velocities are measured in cm/s.
A, Intra-arterial Doppler-tipped guidewire spectra obtained immediately before the stent placement procedure.
B, Duplex color Doppler sonography spectra obtained 2 hours before stent placement.
- Fig 2.
Angiograms of the patient whose spectra are shown in Figure 1.
A, Before angioplasty of >80% stenosis of the right carotid artery.
B, After the procedure, successful angioplasty and stent placement can be seen.
- Fig 3.
Examples of Doppler spectra. Velocities are measured in cm/s.
A, Intra-arterial Doppler-tipped guidewire spectra obtained immediately after the stent placement procedure.
B, Duplex color Doppler sonography spectra obtained 2 hours after stent placement.
- Fig 4.
Angiograms of the patient whose spectra are shown in Figure 3.
A, Before angioplasty of >80% stenosis of the right carotid artery.
B, After the procedure, successful angioplasty and stent placement can be seen.
Tables
Pre- and post-stent angiography, intra-arterial Doppler ultrasonography, and duplex Doppler ultrasonography data
Patient No. Pre-stent Angiogram % Stenosis Post-stent Angiogram %Stenosis Pre-stent IAD PSV (cm/s) Post-stent IAD PSV (cm/s) Pre-stent Duplex PSV (cm/s) Post-stent Duplex PSV (cm/s) 1 73 50 320 180 450 200 2 89 42 ITA 100 400 160 3 80 54 160 60 N/A 140 4 88 33 ITA 60 250 90 5 81 27 240 80 N/A 60 6 92 54 ITA 60 250 90 7 90 25 ITA 120 N/A 110 8 71 20 180 60 N/A 60 9 80 NP 350 NP N/A N/A 10 78 33 120 90 170 110 11 75 43 240 60 300 60 12 80 N/A 100 60 N/A 60 13 89 34 250 120 N/A 250 14 94 62 250 120 250 85 15 70 46 320 120 N/A N/A 16 81 53 160 60 275 60 Note.—IAD indicates intra-arterial Doppler sonography; PSV, peak systolic velocity; ITA, impossible to advance past stenosis; NA, not available; NP, angioplasty not performed because of patient’s vasovagal response.
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