Bone Marrow Mononuclear Stem Cells Transplanted in Rat Infarct Myocardium Improved the Electrical Conduction without Evidence of Proarrhythmic Effects
Yonsei Medical Journal
;
: 754-764, 2007.
Article
in English
| WPRIM
| ID: wpr-175327
ABSTRACT
PURPOSE:
The arrhythmogenic effect of stem cells transplantation (SCT) in an infarct myocardium is still unknown. We investigated arrhythmogenicity of SCT in rat cryo-infarct model. MATERIALS ANDMETHODS:
In rat cryo-infarct model, bone marrow mononuclear stem cells (MNSC, 1 x 10(7) cells) were transplanted into the infarct border zone (BZ) of the LV epicardium. We compared the optical mapping and inducibility of ventricular tachycardia/fibrillation (VT/VF) among normal (n=5), cryo-infarct (n=6), and SCT rats (n=6).RESULTS:
The VT/VF inducibility was higher in the cryo- infarct (47.2%, p=0.001) and SCT groups (34.6%, p=0.01) than in the normal group (12.8%). The induced VT/VF episodes persisted for more than 2 minutes in 4.3%, 26.4% and 17.3% in the normal, cryo-infarct and SCT group, respectively. In the SCT group, the action potential duration at 70% was shorter at the SCT site than the BZ during SR (75.2 +/- 8.1 vs. 145.6 +/- 4.4 ms, p=0.001) and VT (78.2 +/- 13.0 vs. 125.7 +/- 21.0 ms, p= 0.001). Conduction block was observed at the SCT site and BZ during VT. However, no reentry or ectopic foci were observed around the SCT sites.CONCLUSION:
The electrical conduction was improved by SCT without evidence of augmentation of arrhythmia in the rat cryo-infarct model.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Arrhythmias, Cardiac
/
Action Potentials
/
Bone Marrow Transplantation
/
Rats, Sprague-Dawley
/
Hematopoietic Stem Cell Transplantation
/
Disease Models, Animal
/
Electric Conductivity
/
Heart Ventricles
/
Myocardial Infarction
Limits:
Animals
Language:
English
Journal:
Yonsei Medical Journal
Year:
2007
Type:
Article
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