Document Detail

Microvascular Coronary Flow Comparison in Acute Myocardial Infarction Angioplasty treated with a mesh covered stent (MGUARD Stent) versus Bare Metal Stent: MICAMI-MGUARD.
MedLine Citation:
PMID:  23337378     Owner:  NLM     Status:  In-Data-Review    
BACKGROUND: Distal embolization of thrombus/platelet aggregates decreases myocardial reperfusion during primary percutaneous coronary intervention (PCI), and is associated with worse immediate and long-term prognosis of patients with ST-elevation myocardial infarction (STEMI).
OBJECTIVE: Assess the efficacy of a mesh covered stent (MGuard™ stent, MGS) in preventing distal embolization and microvascular reperfusion impairment during primary PCI, compared with a bare metal stent (BMS).
METHODS: Forty patients with STEMI referred for primary PCI were randomized for stenting the culprit lesion with the MGS (n = 20) or a BMS (n = 20). Blinded experts performed off-line measurements of angiographic epicardial and microvascular reperfusion criteria: TIMI flow grade, myocardial blush, corrected TIMI frame count (cTFC).
RESULTS: At baseline clinical, angiographic and procedural variables were not different between groups. Post PCI TIMI flow grade was similar in both groups. We observed better myocardial Blush grade in group MGS compared to BMS (median value 3.0 vs 2.5, 2p = 0.006) and cTFC (mean cTFC: MGS 19.65 ± 4.07 vs BMS 27.35 ± 7.15, 2p < 0.001, cTFC mean difference MGS-BMS: 7.7, CI 95%: 3.94 to 11.46). MGS stent group had a higher percentage of successful angioplasty (cTFC ≤ 23: MGS 85% vs BMS 30%, 2p < 0.001). We had two cases of acute stent thrombosis (one for each group) at 30days follow up, but no clinical events at 6 months follow up.
CONCLUSIONS: In this exploratory study, MGS significantly improved microvascular reperfusion criteria compared with a BMS in primary PCI. However its safety and impact on clinical outcomes should be verified in larger randomized clinical trials.
Dante S Lindefjeld; Eduardo Guarda; Manuel Méndez; Alejandro Martínez; Osvaldo Pérez; Alejandro Fajuri; Eugenio Marchant; Mauricio Aninat; Humberto Torres; Gastón Dussaillant
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Cardiovascular revascularization medicine : including molecular interventions     Volume:  14     ISSN:  1878-0938     ISO Abbreviation:  Cardiovasc Revasc Med     Publication Date:  2013 Jan 
Date Detail:
Created Date:  2013-01-22     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101238551     Medline TA:  Cardiovasc Revasc Med     Country:  United States    
Other Details:
Languages:  eng     Pagination:  4-8     Citation Subset:  IM    
Copyright Information:
Copyright © 2013 Elsevier Inc. All rights reserved.
Hospital Clínico, Pontificia Universidad Católica de Chile; Hospital Dr. Sótero del Río, Santiago-Chile. Electronic address:
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