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Angiology
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Article

Is Increased Thrombin Activation in Patients With Abdominal Aortic Aneurysms Dependent on Area or Volume of Aneurysm Thrombus Mass?

Tilo Kolbel, Tobias Donath, Karin Strandberg, Despina Flondell-Site, Tobias Kuhme, Anders Gottsater, and Bengt Lindblad*

* To whom correspondence should be addressed. E-mail: bengt.lindblad{at}med.lu.se.


  Abstract

Objectives: Does thrombin activation seen in patients with abdominal aortic aneurysms (AAA) relate to the thrombus surface area or volume within the aneurysm? Patients and methods: A total of 130 patients with AAA were analyzed regarding levels of the complex between activated protein C-protein C inhibitor (APC-PCI) and AAA morphology. Analysis of APC-PCI complex was made using a sandwich immunofluorometric method. Results: Increased APC-PCI concentrations were seen in patients with AAA (0.44 µg/L; P < .001 compared with controls). The correlations of APC-PCI values were r = .13, P = .13 for aneurysm size, r = .08, P = .35 for thrombus surface area, and r = .13, P = .14 for thrombus volume. APC-PCI values elevated to 0.45 µg/L in 10 patients with AAA having no or very little thrombus mass. Conclusion: Disappointingly, no correlation was found between thrombus surface area or volume and levels of the APC-PCI complex. Mechanisms other than the AAA-sac thrombus must be evaluated as cause of thrombin activation in patients with AAA.

First published on July 21, 2009
Angiology 2009, doi:10.1177/0003319709335906
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