European Heart Journal Advance Access published online on December 23, 2008
European Heart Journal, doi:10.1093/eurheartj/ehn532
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Improved regional function after autologous bone marrow-derived stem cell transfer in patients with acute myocardial infarction: a randomized, double-blind strain rate imaging study
1 Department of Cardiology, Gasthuisberg University Hospital, University of Leuven, 49 Herestraat, B-3000 Leuven, Belgium
2 Department of Haematology, Gasthuisberg University Hospital, University of Leuven, Leuven, Belgium
3 Department of Radiology, Gasthuisberg University Hospital, University of Leuven, Leuven, Belgium
4 The Stem Cell Institute Leuven (SCIL), Gasthuisberg University Hospital, University of Leuven, Leuven, Belgium
5 The Centre for Transgene Technology and Gene Therapy, Gasthuisberg University Hospital, University of Leuven, Leuven, Belgium
Received 25 April 2007; revised 23 October 2008; accepted 18 November 2008.
* Corresponding author. Tel: +32 16 344235, Fax: +32 16 344240, Email: lieven.herbots{at}uz.kuleuven.ac.be
Aims: To investigate whether intracoronary transfer of bone marrow progenitor cells (BMPCs) early after reperfusion of an acute myocardial infarction improves regional myocardial function in a randomized double-blind, placebo-controlled strain rate imaging study.
Methods and results: Regional myocardial deformation was measured using velocity-derived strain rate imaging in 67 STEMI patients randomized 1:1 to intracoronary infusion of BMPC (n = 33) or placebo (n = 34). Myocardial segments were grouped into infarct (n = 232), border (n = 250), and remote (n = 526) based on MRI-delayed enhancement and the perfusion territory of the infarct-related vessel.
Four months after revascularization and progenitor cell/placebo transfer, regional myocardial deformation (rate) improved significantly more in the infarct segments of BMPC patients (treatment effect on end-systolic strain: –3.7 ± 1.0%, P = 0.0003; peak-systolic strain rate: –0.20 ± 0.07 s–1, P = 0.0035). These findings were confirmed by a significantly greater improvement of longitudinal mitral valve ring displacement in the infarct walls of BMPC patients (treatment effect: 0.93 mm, P = 0.034).
Conclusion: Intracoronary infusion of BMPC early after reperfusion of a STEMI improves recuperation of regional myocardial function at 4 months' follow-up. Quantitative assessment of regional systolic function might be more sensitive than global LV ejection fraction for the evaluation of BMPC therapy after STEMI.
Key Words: Stem cell therapy Regional myocardial function Strain rate imaging Acute myocardial infarction
This paper was guest edited by Prof. Cassiano Abreu e Lima, Porto School of Medicine, Al. Hernâni Monteiro, Porto, Portugal, email: assal{at}hsjoo.min-saude.pt; cassal{at}netcabo.pt
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