Document Detail

Impact of primary coronary angioplasty delay on myocardial salvage, infarct size, and microvascular damage in patients with ST-segment elevation myocardial infarction: insight from cardiovascular magnetic resonance.
MedLine Citation:
PMID:  19942086     Owner:  NLM     Status:  MEDLINE    
OBJECTIVES: We investigated the extent and nature of myocardial damage by using cardiovascular magnetic resonance (CMR) in relation to different time-to-reperfusion intervals. BACKGROUND: Previous studies evaluating the influence of time to reperfusion on infarct size (IS) and myocardial salvage in patients with ST-segment elevation myocardial infarction (STEMI) have yielded conflicting results. METHODS: Seventy patients with STEMI successfully treated with primary percutaneous coronary intervention within 12 h from symptom onset underwent CMR 3 +/- 2 days after hospital admission. Patients were subcategorized into 4 time-to-reperfusion (symptom onset to balloon) quartiles: < or =90 min (group I, n = 19), >90 to 150 min (group II, n = 17), >150 to 360 min (group III, n = 17), and >360 min (group IV, n = 17). T2-weighted short tau inversion recovery and late gadolinium enhancement CMR were used to characterize reversible and irreversible myocardial injury (area at risk and IS, respectively); salvaged myocardium was defined as the normalized difference between extent of T2-weighted short tau inversion recovery and late gadolinium enhancement. RESULTS: Shorter time-to-reperfusion (group I) was associated with smaller IS and microvascular obstruction and larger salvaged myocardium. Mean IS progressively increased overtime: 8% (group I), 11.7% (group II), 12.7% (group III), and 17.9% (group IV), p = 0.017; similarly, MVO was larger in patients reperfused later (0.5%, 1.5%, 3.7%, and 6.6%, respectively, p = 0.047). Accordingly, salvaged myocardium markedly decreased when reperfusion occurred >90 min of coronary occlusion (8.5%, 3.2%, 2.4%, and 2.1%, respectively, p = 0.004). CONCLUSIONS: In patients with STEMI treated with primary percutaneous coronary intervention, time to reperfusion determines the extent of reversible and irreversible myocardial injury assessed by CMR. In particular, salvaged myocardium is markedly reduced when reperfusion occurs >90 min of coronary occlusion.
Marco Francone; Chiara Bucciarelli-Ducci; Iacopo Carbone; Emanuele Canali; Raffaele Scardala; Francesca A Calabrese; Gennaro Sardella; Massimo Mancone; Carlo Catalano; Francesco Fedele; Roberto Passariello; Jan Bogaert; Luciano Agati
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  Journal of the American College of Cardiology     Volume:  54     ISSN:  1558-3597     ISO Abbreviation:  J. Am. Coll. Cardiol.     Publication Date:  2009 Dec 
Date Detail:
Created Date:  2009-11-27     Completed Date:  2010-01-05     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8301365     Medline TA:  J Am Coll Cardiol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2145-53     Citation Subset:  AIM; IM    
Cardiovascular Magnetic Resonance Unit, Department of Radiology Sciences, Sapienza University of Rome, Rome 00161, Italy.
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MeSH Terms
Angioplasty, Transluminal, Percutaneous Coronary / methods*
Coronary Circulation / physiology*
Follow-Up Studies
Magnetic Resonance Imaging / methods*
Middle Aged
Myocardial Infarction / diagnosis,  physiopathology,  therapy*
Myocardial Reperfusion Injury / diagnosis*,  etiology,  physiopathology
Prospective Studies
Time Factors
Comment In:
J Am Coll Cardiol. 2009 Dec 1;54(23):2154-6   [PMID:  19942087 ]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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