Abstract:A 20-week-old male Sprague Dawley rat noted with decreased body weight, dyspnea, and anorexia beginning 2 days before death was necropsied in the recovery period of a sub-chronic toxicity study. The heart was severely enlarged (30 × 20 × 20 mm), 3–4 times larger than normal, with an approximately 6 mm wide defect in the upper, membranous portion of the ventricular septum. Both ventricles measured 4 mm in thickness, and the right ventricle was 4 times thicker than normal. According to a microscopic examination,… Show more
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