Systemic inflammation and reperfusion injury in patients with acute myocardial infarction.

Abstract:

:Despite early recanalization of an occluded infarct artery, tissue reperfusion remains impaired in more than one-third of the acute myocardial infarction (AMI) patients owing to a process of reperfusion injury. The role of systemic inflammation in triggering this phenomenon is unknown. Proinflammatory factors (hs-CRP, TNF-alpha ) and anti-inflammatory mediators (IL-1 receptor antagonist, IL-10) were measured in 65 patients during the acute phase of a myocardial infarction as well as in 11 healthy control subjects. Myocardial reperfusion injury was defined as the presence of persistent ST-segment elevation despite successful coronary intervention (> or = 50 of the initial value) and was observed in 28 patients. Systemic proinflammatory mediators (particularly hs-CRP and leukocytes) were higher in AMI patients compared to control subjects. Within the group of AMI patients, only serum TNF-alpha differed significantly between patients with versus without reperfusion injury: a median value of 25 versus 13 pg/mL was observed, respectively. Logistic regression analysis identified a high level of TNF-alpha as the most important independent determinant of reperfusion injury (P = .001), beyond total ischemic time (P = .01) and extent of jeopardized myocardium (P = .08). There was no correlation between the TNF-alpha level and the total ischemic time (P = .8) or the extent of jeopardized myocardium (P = .6). Systemic inflammation, in particular high levels of TNF-alpha , is strongly associated with the occurrence of reperfusion injury after successful recanalization. Our findings suggest that TNF-alpha is involved in the triggering and/or amplification of local inflammatory responses related to ischemia-reperfusion injury.

journal_name

Mediators Inflamm

authors

Blancke F,Claeys MJ,Jorens P,Vermeiren G,Bosmans J,Wuyts FL,Vrints CJ

doi

10.1155/MI.2005.385

subject

Has Abstract

pub_date

2005-12-14 00:00:00

pages

385-9

issue

6

eissn

0962-9351

issn

1466-1861

pii

S0962935105509074

journal_volume

2005

pub_type

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