{"title":"Relaxation of frog myocardium.","authors":"G Vassort, M J Roulet, K Mongo, R Clapier-Ventura","doi":"","DOIUrl":null,"url":null,"abstract":"<p><p>Tension fall of frog heart contraction was analyzed under voltage-clamp conditions. It appears mostly exponential. The rate of relaxation depends upon the extracellular and intracellular Na concentrations. This suggests that the relaxation is under the control of Na-Ca exchange. The speeding up of relaxation by adrenaline in frog heart is revealed by low Na solution, while it is hidden by the primordial Na-Ca exchange in Ringer's solution.</p>","PeriodicalId":21025,"journal":{"name":"Recent advances in studies on cardiac structure and metabolism","volume":"11 ","pages":"143-7"},"PeriodicalIF":0.0000,"publicationDate":"1976-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Recent advances in studies on cardiac structure and metabolism","FirstCategoryId":"1085","ListUrlMain":"","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
Tension fall of frog heart contraction was analyzed under voltage-clamp conditions. It appears mostly exponential. The rate of relaxation depends upon the extracellular and intracellular Na concentrations. This suggests that the relaxation is under the control of Na-Ca exchange. The speeding up of relaxation by adrenaline in frog heart is revealed by low Na solution, while it is hidden by the primordial Na-Ca exchange in Ringer's solution.
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