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Myocardial infarction without obstructive coronary artery disease.
MedLine Citation:
PMID:  22941122     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
PURPOSE OF REVIEW: A substantial minority of myocardial infarction (MI) patients have no obstructive coronary artery disease (CAD) at angiography. Women more commonly have this type of MI, but both sexes are affected. This is not an innocuous problem. Multiple studies have shown 2% death or reinfarction in short-term to mid-term follow-up. RECENT FINDINGS: Two large autopsy series confirmed MI without obstructive CAD as a cause of death. Intravascular ultrasound (IVUS) and cardiac MRI (CMR) were studied in patients with MI without obstructive CAD. Plaque rupture was found in nearly 40% and late gadolinium enhancement was seen in nearly 40%, with little overlap in imaging findings. Additional CMR studies in similar patients have shown variable frequencies and patterns of late enhancement, but consistently demonstrate an ability to identify nonischemic causes (myocarditis, infiltrative disease). Ischemic myocardial injury on CMR may be due to plaque rupture but also occurs in patients without plaque rupture. These cases may be caused by vasospasm, embolism, dissection, or branch occlusion. SUMMARY: MI without obstructive CAD is a heterogeneous disorder with different mechanisms in different patients. Plaque rupture is common. In the absence of clear demonstration of a nonischemic cause, treatment should include guideline-recommended secondary prevention, including antiplatelet and antiatherosclerotic medications.
Authors:
Harmony R Reynolds
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-8-30
Journal Detail:
Title:  Current opinion in cardiology     Volume:  -     ISSN:  1531-7080     ISO Abbreviation:  Curr. Opin. Cardiol.     Publication Date:  2012 Aug 
Date Detail:
Created Date:  2012-9-3     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8608087     Medline TA:  Curr Opin Cardiol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
Cardiovascular Clinical Research Center, New York University School of Medicine, New York, New York, USA.
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