{"title":"[严重烧伤后心肌收缩和钙转运功能]。","authors":"J Yang, Z Yang, F Chen","doi":"","DOIUrl":null,"url":null,"abstract":"<p><strong>Objective: </strong>This study examined the changes in myocardial calcium transport function and what roles it played in cardiac dysfunction after severe burn injury.</p><p><strong>Methods: </strong>Contraction relaxation properties of the left ventricule (LV) were studied in isolated heart preparations of Wistar rat 3, 8, 24 hours after 30% TBSA full thickness burn. Sarcoplasmic reticulum (SR) calcium transport function was measured by millipore filtration technique.</p><p><strong>Results: </strong>The maximal rates of LV pressure elevation (+ dp/ dtmax) and depression (-dp/dtmax) in burn group were significantly lower than that in control group (P < 0.01). The initial rate and capacity of calcium uptake by SR decreased markedly in burn group than in control group (P < 0.01). In addition, calcium dependent ATPase activity and coupling ratio of SR were also markedly depressed.</p><p><strong>Conclusion: </strong>SR calcium transport function depression was closely related to cardiac contractile dysfunction, and the former is one of the important mechanism for cardiac contractile dysfunction after severe burn injury.</p>","PeriodicalId":77478,"journal":{"name":"Zhonghua zheng xing shao shang wai ke za zhi = Zhonghua zheng xing shao shang waikf [i.e. waike] zazhi = Chinese journal of plastic surgery and burns","volume":"14 3","pages":"211-3"},"PeriodicalIF":0.0000,"publicationDate":"1998-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"[Myocardial contractile and calcium transport function after severe burn injury].\",\"authors\":\"J Yang, Z Yang, F Chen\",\"doi\":\"\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><strong>Objective: </strong>This study examined the changes in myocardial calcium transport function and what roles it played in cardiac dysfunction after severe burn injury.</p><p><strong>Methods: </strong>Contraction relaxation properties of the left ventricule (LV) were studied in isolated heart preparations of Wistar rat 3, 8, 24 hours after 30% TBSA full thickness burn. Sarcoplasmic reticulum (SR) calcium transport function was measured by millipore filtration technique.</p><p><strong>Results: </strong>The maximal rates of LV pressure elevation (+ dp/ dtmax) and depression (-dp/dtmax) in burn group were significantly lower than that in control group (P < 0.01). The initial rate and capacity of calcium uptake by SR decreased markedly in burn group than in control group (P < 0.01). In addition, calcium dependent ATPase activity and coupling ratio of SR were also markedly depressed.</p><p><strong>Conclusion: </strong>SR calcium transport function depression was closely related to cardiac contractile dysfunction, and the former is one of the important mechanism for cardiac contractile dysfunction after severe burn injury.</p>\",\"PeriodicalId\":77478,\"journal\":{\"name\":\"Zhonghua zheng xing shao shang wai ke za zhi = Zhonghua zheng xing shao shang waikf [i.e. waike] zazhi = Chinese journal of plastic surgery and burns\",\"volume\":\"14 3\",\"pages\":\"211-3\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1998-05-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Zhonghua zheng xing shao shang wai ke za zhi = Zhonghua zheng xing shao shang waikf [i.e. waike] zazhi = Chinese journal of plastic surgery and burns\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Zhonghua zheng xing shao shang wai ke za zhi = Zhonghua zheng xing shao shang waikf [i.e. waike] zazhi = Chinese journal of plastic surgery and burns","FirstCategoryId":"1085","ListUrlMain":"","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
[Myocardial contractile and calcium transport function after severe burn injury].
Objective: This study examined the changes in myocardial calcium transport function and what roles it played in cardiac dysfunction after severe burn injury.
Methods: Contraction relaxation properties of the left ventricule (LV) were studied in isolated heart preparations of Wistar rat 3, 8, 24 hours after 30% TBSA full thickness burn. Sarcoplasmic reticulum (SR) calcium transport function was measured by millipore filtration technique.
Results: The maximal rates of LV pressure elevation (+ dp/ dtmax) and depression (-dp/dtmax) in burn group were significantly lower than that in control group (P < 0.01). The initial rate and capacity of calcium uptake by SR decreased markedly in burn group than in control group (P < 0.01). In addition, calcium dependent ATPase activity and coupling ratio of SR were also markedly depressed.
Conclusion: SR calcium transport function depression was closely related to cardiac contractile dysfunction, and the former is one of the important mechanism for cardiac contractile dysfunction after severe burn injury.
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