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AJNR - American Journal of Neuroradiology

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Use of a Pressure-Sensing Wire to Detect Sequential Pressure Gradients for Ipsilateral Vertebral and Subclavian Artery Stenoses

Chung-Pin Liu^a, Yen-Hung Ling^a and Hsien-Li Kao^a

^a From the Department of Internal Medicine, Division of Cardiology, National Taiwan University Hospital

View larger version (140K): [in a new window]   FIG 1. Angiograms.A, Stenosis at the proximal left SCA (arrowhead) and left VA ostium (arrow). B, After stent placement in the VA ostium. C, Final image after stent placement in the left SCA lesion.

View larger version (31K): [in a new window]   FIG 2. Tracings of the pressure-sensing guidewire during angioplasty show instantaneous pressure waves and mean arterial pressures detected by using the guiding catheter proximal to the left SCA lesion (red curves) and distal to the left VA lesion (green curves).Yellow curves are instantaneous FFRs (0.45, 0.88, and 0.92).A, Before treatment. B, After stent placement in the VA ostium. C, After stent placement in the VA ostium and proximal SCA.