No Association between Thrombin Generation and Intra-Plaque Haemorrhage in Symptomatic Carotid Atherosclerotic Plaques: The Plaque at RISK (PARISK) Study.

Abstract:

BACKGROUND: Carotid atherosclerosis is an important cause of stroke. Intra-plaque haemorrhage (IPH) on magnetic resonance imaging (MRI) increases stroke risk. Development of IPH is only partly understood. Thrombin is an essential enzyme in haemostasis. Experimental animal studies have shown conflicting results on the relation between thrombin and plaque vulnerability. We hypothesize that decreased thrombin generation (TG) is associated with IPH and plaque vulnerability. OBJECTIVE: This article investigates whether TG is associated with IPH and other features of plaque vulnerability in stroke patients. METHODS: Recently symptomatic stroke patients underwent carotid MRI and blood sampling. MRI plaque features include plaque burden, presence of IPH, amount of lipid-rich necrotic core (LRNC), calcified tissue and fibrous tissue (% of total wall volume). TG was assessed in platelet-poor plasma and expressed as: peak height (PH) and endogenous thrombin potential (ETP). MR images could be analysed in 224 patients. Blood samples were available in 161 of 224 patients. Binary multivariate logistic and linear regression were used to investigate the association between TG and MRI plaque features. RESULTS: IPH and LRNC were present in 65 (40%) and 102 (63%) of plaques. There were no significant associations between TG and IPH; PH odds ratio (OR) = 1, 95% confidence interval (CI): 0.76 to 1.45 and ETP OR = 1, 95% CI: 0.73 to 1.37. After correction for age, sex and hypercholesterolaemia, the association was weak but non-significant; PH: OR = 0.76, 95% CI: 0.52 to 1.10 and ETP: OR = 0.73, 95% CI: 0.53 to 1.37. CONCLUSION: Features of carotid plaque on MRI show no significant association with TG in stroke patients. Systemic TG does not seem to be an important factor in IPH development.

journal_name

Thromb Haemost

authors

Crombag GAJC,Spronk HM,Nelemans P,Schreuder FHBM,Truijman MTB,van Dijk AC,de Rotte AAJ,Liem MI,Daemen MJAP,van der Steen AFW,Mess WH,Nederkoorn PJ,Hendrikse J,van der Lugt A,Wildberger JE,Ten Cate H,van Oostenbrugge RJ,

doi

10.1055/s-0038-1666858

subject

Has Abstract

pub_date

2018-08-01 00:00:00

pages

1461-1469

issue

8

eissn

0340-6245

issn

2567-689X

journal_volume

118

pub_type

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