Document Detail

Reocclusion: the flip side of coronary thrombolysis.
MedLine Citation:
PMID:  8613601     Owner:  NLM     Status:  MEDLINE    
Since the introduction of thrombolytic therapy for acute myocardial infarction, the incidence of coronary artery reocclusion has been intensively studied. Also, the prediction and diagnosis of reocclusion by angiographic and clinical variables, as well its invasive and pharmacologic prevention, have gained much attention. By angiographic definition, reocclusion requires three angiographic observations: one with an occluded artery, one with a reperfused artery and a third for the assessment of subsequent occlusion (true reocclusion). Since the introduction of early intravenous reperfusion therapy, most studies use only two angiograms: one with a patent and one with a nonpatent infarct-related artery. A search for all published reocclusion studies revealed 61 studies (6,061 patients) with at least two angiograms. The median time interval between the first angiogram after thrombolysis and the second was 16 days (range 0.1 to 365). Reocclusion was observed in 666 (11%) of 6,061 cases. Interestingly, the 28 true reocclusion studies showed an incidence of reocclusion of 16 +/- 10% (mean +/- SD), and the 33 studies with only two angiograms 10 +/- 8% (p=0.04), suggesting that proven initial occlusion of the infarct-related artery is a risk factor for reocclusion after successful thrombolysis. The other predictors for reocclusion are probably severity of residual stenosis of the infarct-related artery after thrombolysis and perhaps the flow state after lysis. Reocclusion is most frequently seen in the early weeks after thrombolysis. The clinical course in patients with reocclusion is more complicated than in those without this complication. Left ventricular contractile recovery after thrombolysis is hampered by reocclusion. Routine invasive strategies have not been proven effective against reocclusion. In the prevention of reocclusion, both antiplatelet and antithrombin strategies have been tested, including hirudin and hirulog, but the safety of these agents in thrombolysis is still questionable. Thus, reocclusion after thrombolysis is an early phenomenon and is more frequent after proven initial occlusion of the infarct-related artery. Reocclusion can be predicted by angiography after thrombolysis. Because reocclusion is detrimental, strategies to prevent it should be developed and carried out after thrombolytic therapy for acute myocardial infarction as soon as they are deemed safe.
F W Verheugt; A Meijer; W K Lagrand; M J Van Eenige
Publication Detail:
Type:  Journal Article; Review    
Journal Detail:
Title:  Journal of the American College of Cardiology     Volume:  27     ISSN:  0735-1097     ISO Abbreviation:  J. Am. Coll. Cardiol.     Publication Date:  1996 Mar 
Date Detail:
Created Date:  1996-06-03     Completed Date:  1996-06-03     Revised Date:  2005-11-16    
Medline Journal Info:
Nlm Unique ID:  8301365     Medline TA:  J Am Coll Cardiol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  766-73     Citation Subset:  AIM; IM    
Department of Cardiology, University Hospital Nijmegen St. Radboud, Nijmegen, The Netherlands.
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MeSH Terms
Antithrombins / therapeutic use
Constriction, Pathologic
Coronary Angiography
Fibrinolytic Agents / therapeutic use
Heparin / therapeutic use
Hirudin Therapy
Hirudins / analogs & derivatives
Myocardial Infarction / drug therapy*,  epidemiology,  prevention & control
Peptide Fragments / therapeutic use
Recombinant Proteins / therapeutic use
Thrombolytic Therapy*
Reg. No./Substance:
0/Antithrombins; 0/Fibrinolytic Agents; 0/Hirudins; 0/Peptide Fragments; 0/Recombinant Proteins; 128270-60-0/bivalirudin; 9005-49-6/Heparin

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