What question did this study set out to answer?

To explore the relationship between AT1R expression, fibrosis, and cardiac function following myocardial infarction in a rat model.

Transient Increase in AT1R Expression at the Myocardial Infarct Site Is Associated with Early Fibrotic Remodeling in Infarcted Rat Heart

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To explore the relationship between AT1R expression, fibrosis, and cardiac function following myocardial infarction in a rat model.
Sprague-Dawley rats underwent Sham surgery, Ischemia/Reperfusion, or Permanent Ligation of the artery.
Cardiac function was assessed using echocardiography.
AT1R expression was measured via autoradiography in heart and kidneys.
Collagen deposition was analyzed through picrosirius red staining.
Higher AT1R expression correlates with increased collagen in infarct areas.
LV ejection fraction decreased in Permanent Ligation models but remained stable after Ischemia/Reperfusion.
Cardiac AT1R levels showed transient increases post-I/R and persistent elevation after PL.

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Animal model reveals that ischemic injury triggers myocardial infarction linked to increased fibrosis and reduced cardiac function.

Drumeva et al. (2026) studied this question.

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