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《Progress In Veterinary Medicine》 2001-01
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The Pathogenesis of Broilers Ascites Ⅲ.The Effect of Low Temperature on Heart Function and Histopathological Changes of Ventricles

HE Cheng,LIANG Li cheng,ZHAO De ming (College of Veterinary Medicine, China Agriculture University, 100094,China)  
The change of right ventricle function was evaluated using electrocardiographic analysis and histopathology of electronic micrograph was firstly investigated in low temperature.The results showed that the S wave amplitudes in lead Ⅱ and aVF had attained a more negative amplitude since the broilers were suffered from cold stress,mainly characterized as rS wave. The pathological change of left ventricle was initiated in the early low temperature,myofibril showed edema, mitochondria slightly increased in numbers, while morphological alteration of right ventricle remained normal in early time.The change of right ventricle began after 3 and 4 weeks exposed to cold stress,the myocardial fiber showed swollen and damaged ultrstracturally, with a disarrangement and swollen of mitochondria and structural changes in the cristae,some The changes of myocardium and mitochondria in the left ventricle were similar to but more severe than those in the right ventricle.in the end.The different change between right ventricle and left ventricle suggest that right ventricle function becomes decompensation in middle phase suffered from cold exposure, At end the histopathology of left ventricle attained grievous injury than that of right ventricle. These changes of left ventricle may have direct effect on developing broiler ascites.
【Fund】: “八五”农业部畜牧业重点科研课题“家禽腹水症综合防治开发性研究”中的单项试验
【CateGory Index】: S858.31
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