Document Detail


Attenuation of cardiac remodelling by endocardial injection of erythropoietin: ultrasonic strain-rate imaging in a model of hibernating myocardium.
MedLine Citation:
PMID:  17242014     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
AIMS: The aim of this study was to investigate whether erythropoietin (EPO) has cardioprotective effects in a chronic myocardial ischaemia model regarding strain-rate imaging parameters during dobutamine stress echocardiography (DSE). METHODS AND RESULTS: An ameroid constrictor was placed around the circumflex artery in 13 pigs to induce hibernating myocardium by a chronic vessel occlusion. The pigs were randomized 14 days later: seven pigs receiving 10,000 U EPO and six pigs receiving placebo injected into the ischaemic region using a NOGAtrade mark-guided transendocardial catheter. At weeks 2 and 6, animals were examined by DSE, electromechanical mapping, and coronary angiography. During incremental dobutamine infusion, regional radial function was monitored by measuring peak systolic strain-rates (SRsys), systolic strains (epsilonsys), and post-systolic strains (epsilonps). At week 6, the animals were pathohistologically investigated. Echocardiography revealed 2.2+/-0.8 hypokinetic segments in the EPO-treated animals in comparison with 3.3+/-0.9 akinetic segments per animal in the controls. The mean ejection fraction was reduced in the control group (55+/-3 vs. 66+/-4%, P=0.057). Strain-rate imaging revealed ischaemic myocardium in EPO-treated animals and non-viable myocardium in the controls (P=0.0001). Histological analysis of the ischaemic region revealed a reduction of myocardial fibrosis (8+/-1 vs. 27+/-5%) in the EPO-treated group. The transmural extension of fibrosis and the echocardiographic deformation data correlated in the posterior walls (EPO group): epsilonsys at rest r=0.83; peak SRsys during dobutamine stimulation r=0.92, P=0.01. CONCLUSION: Endocardial EPO injection may induce cardioprotective effects in chronic ischaemic myocardium and helps to obtain the myocardial contractile reserve, objectified by ultrasonic strain-rate imaging.
Authors:
Carsten Schneider; Kai Jaquet; Rainer Malisius; Stephan Geidel; Edda Bahlmann; Sigrid Boczor; Thomas Rau; Matthias Antz; Karl-Heinz Kuck; Korff Krause
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2007-01-22
Journal Detail:
Title:  European heart journal     Volume:  28     ISSN:  0195-668X     ISO Abbreviation:  Eur. Heart J.     Publication Date:  2007 Feb 
Date Detail:
Created Date:  2007-02-16     Completed Date:  2007-11-08     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8006263     Medline TA:  Eur Heart J     Country:  England    
Other Details:
Languages:  eng     Pagination:  499-509     Citation Subset:  IM    
Affiliation:
Department of Cardiology, Asklepios Klinik, St. Georg II. Med. Abteilung (Kardiologie), Lohmühlenstrasse 5, 20099 Hamburg, Germany. dr_c_schneider@hotmail.com
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MeSH Terms
Descriptor/Qualifier:
Animals
Cardiotonic Agents / pharmacology*
Constriction
Coronary Disease / physiopathology
Dopamine / pharmacology*
Echocardiography
Erythropoietin, Recombinant / pharmacology*
Injections, Intralesional
Myocardial Stunning / physiopathology*,  ultrasonography
Random Allocation
Stress, Mechanical
Swine
Systole
Ventricular Remodeling / drug effects*
Chemical
Reg. No./Substance:
0/Cardiotonic Agents; 0/Erythropoietin, Recombinant

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


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