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Holloway BJ, Rosewarne D, Jones RG. Imaging of thoracic aortic disease. Br J Radiol 2012; 84 Spec No 3:S338-54. [PMID: 22723539 DOI: 10.1259/bjr/30655825] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
Aortic pathology can be more complex to understand on imaging than is initially appreciated. There are a number of imaging modalities that provide excellent assessment of aortic pathology and enable the accurate monitoring of disease. This review discusses the imaging of the most common disease processes that affect the aorta in adults, with the primary focus being on CT and MRI.
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Affiliation(s)
- B J Holloway
- University Hospital Birmingham NHS Foundation Trust, Edgbaston, Birmingham, UK.
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Thanopoulos BV, Giannakoulas G, Arampatzis CA. Percutaneous pulmonary valve implantation in the native right ventricular outflow tract. Catheter Cardiovasc Interv 2011; 79:427-9. [PMID: 21523885 DOI: 10.1002/ccd.23095] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/03/2011] [Accepted: 02/28/2011] [Indexed: 11/07/2022]
Abstract
Percutaneous pulmonary valve implantation into dysfunctional right ventricular (RV) to pulmonary artery conduits is being increasingly performed in many European and North American centers with satisfactory results and low-complication rates. We report the first application of this elaborate technique in the native RV outflow tract of a young patient who developed severe supravalvular pulmonary stenosis following an arterial switch operation for transposition of the great arteries. The procedure may be used as an alternative to surgical repair for the treatment of selected patients with supravalvular pulmonary stenosis complicating congenital heart surgery.
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Kenny D, Cao QL, Kavinsky C, Hijazi ZM. Innovative resource utilization to fashion individualized covered stents in the setting of aortic coarctation. Catheter Cardiovasc Interv 2011; 78:413-8. [DOI: 10.1002/ccd.22999] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Muthusubramaniam L, Lowe R, Fissell WH, Li L, Marchant RE, Desai TA, Roy S. Hemocompatibility of silicon-based substrates for biomedical implant applications. Ann Biomed Eng 2011; 39:1296-305. [PMID: 21287275 PMCID: PMC3069312 DOI: 10.1007/s10439-011-0256-y] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2010] [Accepted: 01/18/2011] [Indexed: 11/24/2022]
Abstract
Silicon membranes with highly uniform nanopore sizes fabricated using microelectromechanical systems (MEMS) technology allow for the development of miniaturized implants such as those needed for renal replacement therapies. However, the blood compatibility of silicon has thus far been an unresolved issue in the use of these substrates in implantable biomedical devices. We report the results of hemocompatibility studies using bare silicon, polysilicon, and modified silicon substrates. The surface modifications tested have been shown to reduce protein and/or platelet adhesion, thus potentially improving biocompatibility of silicon. Hemocompatibility was evaluated under four categories—coagulation (thrombin–antithrombin complex, TAT generation), complement activation (complement protein, C3a production), platelet activation (P-selectin, CD62P expression), and platelet adhesion. Our tests revealed that all silicon substrates display low coagulation and complement activation, comparable to that of Teflon and stainless steel, two materials commonly used in medical implants, and significantly lower than that of diethylaminoethyl (DEAE) cellulose, a polymer used in dialysis membranes. Unmodified silicon and polysilicon showed significant platelet attachment; however, the surface modifications on silicon reduced platelet adhesion and activation to levels comparable to that on Teflon. These results suggest that surface-modified silicon substrates are viable for the development of miniaturized renal replacement systems.
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Affiliation(s)
- Lalitha Muthusubramaniam
- Department of Bioengineering and Therapeutic Sciences, University of California, San Francisco, Box 2520, QB3 Second Floor BH203, San Francisco, CA 94158-2330 USA
- Joint Graduate Group in Bioengineering, University of California, San Francisco–University of California, Berkeley, San Francisco, CA USA
| | - Rachel Lowe
- Department of Bioengineering and Therapeutic Sciences, University of California, San Francisco, Box 2520, QB3 Second Floor BH203, San Francisco, CA 94158-2330 USA
| | - William H. Fissell
- Department of Biomedical Engineering, Cleveland Clinic, Cleveland, OH USA
- Department of Nephrology and Hypertension, Cleveland Clinic, Cleveland, OH USA
| | - Lingyan Li
- Department of Biomedical Engineering, Cleveland Clinic, Cleveland, OH USA
| | - Roger E. Marchant
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH USA
| | - Tejal A. Desai
- Department of Bioengineering and Therapeutic Sciences, University of California, San Francisco, Box 2520, QB3 Second Floor BH203, San Francisco, CA 94158-2330 USA
- Joint Graduate Group in Bioengineering, University of California, San Francisco–University of California, Berkeley, San Francisco, CA USA
| | - Shuvo Roy
- Department of Bioengineering and Therapeutic Sciences, University of California, San Francisco, Box 2520, QB3 Second Floor BH203, San Francisco, CA 94158-2330 USA
- Joint Graduate Group in Bioengineering, University of California, San Francisco–University of California, Berkeley, San Francisco, CA USA
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