Circulation. 2002;106:1672-1677
Published online before print September 3, 2002, doi: 10.1161/01.CIR.0000030189.27175.4E
Published online before print September 3, 2002, doi: 10.1161/01.CIR.0000030189.27175.4E
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(Circulation. 2002;106:1672.)
© 2002 American Heart Association, Inc.
Clinical Investigation and Reports |
Plaque Gruel of Atheromatous Coronary Lesion May Contribute to the No-Reflow Phenomenon in Patients With Acute Coronary Syndrome
From the Cardiovascular Division, Kansai Rosai Hospital (J.K., S.N., T.O., T.M., S.N.), Amagasaki, Japan; Cardiovascular Research Foundation (G.S.M.), New York, NY; and the Department of Internal Medicine and Therapeutics (M.H., M.K.), Osaka University Graduate School of Medicine, Osaka, Japan.
Correspondence to Shinsuke Nanto, MD, Cardiovascular Division, Kansai Rosai Hospital, 3-1-69 Inabasou, Amagasaki, 660-8511 Japan. E-mail AC6S-NNT{at}asahi-net.or.jp
Background— No-reflow associated with direct angioplasty (PCI) of patients with acute coronary syndromes (ACS) is associated with unfavorable results.
Methods and Results— We used a new thrombectomy device to treat 51 lesions in 48 consecutive ACS patients (40 male and 8 female; mean age 63 years) and conducted a microscopic analysis of aspirates and blood samples retrieved from the culprit coronary artery. The first aspirate was collected before PCI and the second was collected separately after percutaneous transluminal coronary angioplasty or stenting, including samples from the no-reflow lumen. Light microscopy showed that the materials obtained from the pre-PCI aspiration consisted of thrombus in 37.5%, thrombus and atheroma in 35.0%, and atheromatous plaque in 27.5%. The materials collected from the post-PCI aspiration were thrombus in 8.3%, thrombus and atheroma in 41.7%, and atheromatous plaque in 50.0%. We then compared the 9 lesions (19.1%) with no-reflow to those without no-reflow. There was no difference in the pre-PCI aspirates. However, after PCI, there was more atheromatous plaque retrieved from patients with no-reflow (P<0.001) as well as significantly more platelet and fibrin complex, macrophages, and cholesterol crystals in the blood aspirated from no-reflow cases. Aspiration of these elements improved the no-reflow in 7 of 9 lesions to TIMI-3 flow.
Conclusions— No-reflow after angioplasty may be caused by gruel that formed from an atheroma attributable to mechanical plaque disruption during intervention.
Key Words: angioplasty • embolism • thrombus • plaque
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