Impact of Ischemia on Mouse Heart Microstructure Using MRI
Author Information
Author(s): Huang Shuning, Mekkaoui Choukri, Chen Howard H, Wang Roupeng, Ngoy Soeun, Liao Ronglih, Wedeen Van, Dai Guangping, Sosnovik David E
Primary Institution: Martinos Center for Biomedical Imaging, Massachusetts General Hospital
Hypothesis
How does ischemia affect the microstructure of the mouse heart as observed through in-vivo diffusion tensor MRI?
Conclusion
In-vivo diffusion tensor MRI shows that mean diffusivity increases and fractional anisotropy decreases during acute ischemia, returning towards baseline as the myocardium heals.
Supporting Evidence
- A significant increase in mean diffusivity and decrease in fractional anisotropy were observed 24 hours after ischemia-reperfusion.
- 3D diffusion MRI tractography produced high-quality images similar to those obtained ex-vivo.
- Mean diffusivity in the injured myocardium increased acutely and returned towards baseline as healing occurred.
Takeaway
The study used special MRI to see how the heart changes after being hurt, showing that some parts get more damaged right after and then start to heal.
Methodology
In-vivo diffusion tensor MRI was performed on 11 mice, with 6 as controls and 5 subjected to ischemia-reperfusion, measuring mean diffusivity and fractional anisotropy at two time points.
Limitations
The study is limited to a small sample size and only examines the mouse model.
Participant Demographics
11 mice, including 6 normal controls and 5 ischemic mice.
Statistical Information
P-Value
<0.05
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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