Quantitative changes in reference segments during IVUS-guided stent implantation: impact on the criteria for optimal stent expansion
| Autor: | Johannes Rieber, Evelyn Regar, Karl H. Henneke, F. Werner, Andreas König, Harald Mudra, Karl Theisen, Volker Klauss |
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| Rok vydání: | 1999 |
| Předmět: |
medicine.medical_specialty
medicine.medical_treatment Lumen (anatomy) Coronary Disease Coronary disease Balloon inflation Angioplasty Intravascular ultrasound medicine Stent implantation Humans Radiology Nuclear Medicine and imaging cardiovascular diseases Angioplasty Balloon Coronary Ultrasonography Interventional medicine.diagnostic_test business.industry Stent General Medicine equipment and supplies Coronary Vessels surgical procedures operative Delta area Stents Radiology Cardiology and Cardiovascular Medicine business |
| Zdroj: | Catheterization and cardiovascular interventions : official journal of the Society for Cardiac AngiographyInterventions. 47(4) |
| ISSN: | 1522-1946 |
| Popis: | Intravascular ultrasound is an established method to optimize stent implantation. Stent expansion is estimated from the relation between minimal in-stent cross-sectional area and reference lumen area. We analyzed the periprocedural lumen increment in the reference segments and its impact on intravascular ultrasound (IVUS) criteria for optimized stenting. Seventy-five consecutive patients were studied with a 2.9 Fr, 30-MHz system and motorized pullback (0.5 mm/sec). Lumen area was measured by planimetry; absolute and relative differences in area (delta area) were calculated. Lumen area increment for reference segments proximal and distal to the stent was 6.4% +/- 10.3% and 6.1% +/- 10.8%; 49/75 patients fulfilled all IVUS criteria for optimal stent expansion at the final IVUS assessment, and 10/75 patients met all the IVUS criteria in relation to the first measurement of reference lumen area, but not in relation to the final measurement of reference lumen area. During high-pressure dilatation within the stent, reference lumen increment is visible. If reference lumen planimetry is not repeated after additional high-pressure balloon inflation, the final relative stent expansion may be overestimated. |
| Databáze: | OpenAIRE |
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