994-92 Dotter Effect of Intravascular Ultrasound Catheters
| Autor: | Charles McMellon, Pedro R. Moreno, Gary P. Foster, Neil J. Weissman, Arthur E. Weyman, Stuart W. Zarich, Igor F. Palacios, Jennifer D. Allen |
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| Rok vydání: | 1995 |
| Předmět: |
Coronary angiography
medicine.medical_specialty medicine.diagnostic_test business.industry Potential effect Percent stenosis equipment and supplies Lesion Catheter medicine.anatomical_structure surgical procedures operative Internal medicine Intravascular ultrasound medicine Cardiology Plaque disruption cardiovascular system Radiology cardiovascular diseases medicine.symptom business Cardiology and Cardiovascular Medicine Artery |
| Zdroj: | Journal of the American College of Cardiology. 25(2) |
| ISSN: | 0735-1097 |
| DOI: | 10.1016/0735-1097(95)92784-3 |
| Popis: | Intravascular ultrasound (IVUS) provides unique images of the coronary artery and plaque although a study using older, larger (4.9F) IVUS catheters reported a significant Dotter effect. Subsequently, smaller and more flexible catheters have been developed but the extent of plaque disruption from these newer IVUS catheter is unknown. The purpose of this study was to determine if there is a Dotter effect from the currently used mechanical IVUS catheters. An IVUS catheter was advanced beyond a coronary lesion in 35 patients before and after a coronary intervention. A 4.3F (n = 10), 3.5F (n = 10) or 2.9F (n = 15) IVUS catheter was used. Ouantitative coronary angiography was performed prior to and immediately after IVUS imaging to determine the change in maximum luminal diameter (MLD) and percent stenosis as a result of the IVUS catheter. Results Prior to coronary intervention, IVUS increased the MLD (0.79 ± 0.07 mm to 1.05 ± 0.08 mm, p = 0.0001) corresponding to a decrease in percent stenosis (70.3 ± 2.4% to 61.1 ± 2.8%, p = 0.001). There was a significant Dotter effect with all of the IVUS catheters. The largest increase in MLD occurred with the 3.5F catheter (0.32 ± 0.09 mm, p = 0.006) while the 2.9F catheter produced the smallest change (0.16 ± 0.14 mm, p = 0.03). MLD and percent stenosis did not change with any IVUS catheter after coronary intervention. Conclusion The passage of the currently used IVUS catheters mechanically alters the plaque and increases the MLD prior to a coronary intervention despite the newer, smaller design. Although there is less plaque disruption with the smallest IVUS catheters, the potential effect on the plaque must be considered prior to IVUS imaging. |
| Databáze: | OpenAIRE |
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