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TG1 transgenic mice have enlarged atria and dilated right ventricles. A: Hearts were removed from NTG and TG1 mice at 20 weeks of age and photographed. B: Transverse sections of NTG and TG1 mice at 30 weeks of age were stained by H&E. RL, right ventricle; LV, left ventricle. Scale bar, 1 mm.
