Why the study?
Does a 45-min recovery period after a 300-V defibrillation shock affect electroporation injury in normal and MI rabbit hearts?
Population
Langendorff-perfused rabbit hearts with and without chronic left ventricular myocardial infarction
Comparison
Single 300-V monophasic truncated exponential… vs Normal vs MI hearts; with vs without 45-min…
Design
Preclinical
Follow-up
45 minutes
Key result
Internal defibrillation shocks caused electroporation near the electrode, with significantly greater propidium iodide uptake in the left ventricular epicardium of infarcted rabbit hearts (P<0.01).
Authors
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Electroporation injury from defibrillation may be amplified in infarcted myocardium; hypothesis-generating for recovery timelines and clinical translation.
Does a 45-min recovery period after a 300-V defibrillation shock affect electroporation injury in normal and MI rabbit hearts?
p-value: p=<0.01
Defibrillation shocks cause electroporation concentrated near the shock electrode, with increased injury in the infarct border zone of MI hearts, and recovery of membrane integrity is a prolonged process.
Wang et al. (2012) studied Myocardial infarction and ventricular fibrillation (n=31). Internal defibrillation shock vs. Normal hearts / without recovery was evaluated on Shock-induced electroporation assessed by propidium iodide (PI) uptake (p=<0.01). Internal defibrillation shocks caused electroporation near the electrode, with significantly greater propidium iodide uptake in the left ventricular epicardium of infarcted rabbit hearts (P<0.01).