Journal article
Renal artery stenosis : Duplex US after angioplasty and stent placement
Radiology, Vol.220(1), pp.168-173
2001
DOI: 10.1148/radiology.220.1.r01jl11168
PMID: 11425991
Abstract
Purpose: To evaluate the hemodynamic outcome of technically successful percutaneous transluminal renal artery angioplasty and stent placement (PTRAS) with duplex ultrasonography (US).
Materials and methods: Eighteen patients who underwent PTRAS in 22 renal arteries were prospectively examined. All had abnormal preprocedural duplex US findings. Those who had significant renal artery stenosis (>70%) at angiography and underwent technically successful percutaneous interventions were enrolled. Standard intrarenal duplex US parameters (acceleration index [AI], acceleration time, waveform morphology grade, and resistive index) were compared before and after interventions.
Results: A significant AI increase occurred after PTRAS (9.02 m/sec(2) +/- 4.85 [SD]), as compared with before intervention (2.34 m/sec(2) +/- 2.03; P <.001). Acceleration time significantly decreased from 0.084 second +/- 0.049 to 0.032 second +/- 0.008 (P <.01). There was also a significant resistive index increase from 0.69 +/- 0.12 to 0.79 +/- 0.12 (P <.01). Abnormal waveform morphology (modified Halpern waveform grade 3-6) was present in 19 (86%) of 22 intrarenal arteries prior to intervention, as compared with one (5%) after PTRAS (P <.001). In the instance in which an abnormal waveform persisted after intervention, waveform morphology improved from grade 6 to grade 3, with a concomitant AI increase from 0.96 to 5.1 m/sec(2).
Conclusion: The findings suggest an important potential role for duplex US in noninvasive assessment of the immediate hemodynamic outcome and long-term follow-up of PTRAS.
Details
- Title: Subtitle
- Renal artery stenosis : Duplex US after angioplasty and stent placement
- Creators
- Melhem J. A SHARAFUDDIN - Department of Radiology, University of Iowa Hospitals and Clinics, 200 Hawkins Dr, 3889 JPP, Iowa City, IA 52242, United StatesCarl A RABOI - Department of Radiology, University of Iowa Hospitals and Clinics, 200 Hawkins Dr, 3889 JPP, Iowa City, IA 52242, United StatesMonzer ABU-YOUSEF - Department of Radiology, University of Iowa Hospitals and Clinics, 200 Hawkins Dr, 3889 JPP, Iowa City, IA 52242, United StatesWilliam J LAWTON - Department Internal Medicine, Division of Nephrology, University of Iowa Hospitals and Clinics, 200 Hawkins Dr, 3889 JPP, Iowa City, IA 52242, United StatesJoel A GORDON - Department Internal Medicine, Division of Nephrology, University of Iowa Hospitals and Clinics, 200 Hawkins Dr, 3889 JPP, Iowa City, IA 52242, United States
- Resource Type
- Journal article
- Publication Details
- Radiology, Vol.220(1), pp.168-173
- Publisher
- Radiological Society of North America; Oak Brook, IL
- DOI
- 10.1148/radiology.220.1.r01jl11168
- PMID
- 11425991
- ISSN
- 0033-8419
- eISSN
- 1527-1315
- Language
- English
- Date published
- 2001
- Academic Unit
- Radiology; Surgery; Nephrology; Internal Medicine
- Record Identifier
- 9984051583202771
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