What question did this study set out to answer?

This study aims to explore the structural and functional changes in cardiac tissue following chronic myocardial infarction in mice.

March 1, 1999Cardiovascular ResearchOpen Access

Chronic myocardial infarction in the mouse: cardiac structural and functional change

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Establishes feasibility of chronic mouse MI model; confirms remodeling parallels to rats for genetic research.

This study aims to explore the structural and functional changes in cardiac tissue following chronic myocardial infarction in mice.
Mice underwent left coronary artery ligation or sham surgery, with evaluations at one to five weeks post-surgery.
DNA synthesis was measured using 5'-bromo-2'-deoxyuridine infusion and morphometric studies assessed cardiac changes.
Left ventricular pressure measurements were taken in separate animal groups at one and three weeks after surgery.
Antero-apical infarction occurred in approximately 40% of the left ventricle post-ligation, leading to wall thinning and left ventricular dilatation.
DNA synthesis peaked at 22-fold in the border zone of the infarct at 1-2 weeks, with elevated synthesis persisting.
Significant increases in septal collagen content (eight-fold at two weeks) were observed.

Esther Lutgens (1999) studied this question.

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