{"title":"人心房纤维跨膜动作电位的生理药理学分析。","authors":"V Kecskeméti, K Kelemen, F Solti, Z Szabó","doi":"","DOIUrl":null,"url":null,"abstract":"<p><p>Transmembrane action potentials (APs) of electrically paced right-atrial tissue obtained from 38 patients of corrective open-heart surgery were analyzed. Two types of APs could be found. The APs of 20 patients (group I) were similar to those of other laboratory mammals. The average resting potential (RP) and the amplitude and maximum rate of rise of phase 0 of APs (Vmax) were -75 mV, 86 mV, and 152 V/sec, respectively, only the repolarization phase being more prolonged than that of other mammalian APs. Epinephrine (5.8 X 10(-6) mole/liter) increased the amplitude of APs and prolonged the plateau phase, producing odd-looking, humped APs. Prostacyclin-Na (6.7 X 10(-7) and 8.7 X 10(-6) mole/liter) increased Vmax. Celluline-A (a biological Ca-complex obtained from frog skin) increased both Vmax and the amplitude of APs and, similar to epinephrine, prolonged the plateau phase. In group I, postoperative arrhythmias occurred in only 1 of the 10 patients. APs obtained from another 18 preparations (group II) were characterized by low RP (-55 mV), small amplitude of AP (59 mV), slow rate of rise of AP (less than 10 V/sec), and very prolonged repolarization. This type of APs can be referred to as slow-response APs. Neither epinephrine, prostacylin-Na, nor celluline-A modified the characteristics of these slow-response APs. In group II, postoperative arrhythmias could be observed in 8 of the 10 patients.</p>","PeriodicalId":77831,"journal":{"name":"Advances in myocardiology","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"1985-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Physiological and pharmacological analysis of transmembrane action potentials of human atrial fibers.\",\"authors\":\"V Kecskeméti, K Kelemen, F Solti, Z Szabó\",\"doi\":\"\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>Transmembrane action potentials (APs) of electrically paced right-atrial tissue obtained from 38 patients of corrective open-heart surgery were analyzed. Two types of APs could be found. The APs of 20 patients (group I) were similar to those of other laboratory mammals. The average resting potential (RP) and the amplitude and maximum rate of rise of phase 0 of APs (Vmax) were -75 mV, 86 mV, and 152 V/sec, respectively, only the repolarization phase being more prolonged than that of other mammalian APs. Epinephrine (5.8 X 10(-6) mole/liter) increased the amplitude of APs and prolonged the plateau phase, producing odd-looking, humped APs. Prostacyclin-Na (6.7 X 10(-7) and 8.7 X 10(-6) mole/liter) increased Vmax. Celluline-A (a biological Ca-complex obtained from frog skin) increased both Vmax and the amplitude of APs and, similar to epinephrine, prolonged the plateau phase. In group I, postoperative arrhythmias occurred in only 1 of the 10 patients. APs obtained from another 18 preparations (group II) were characterized by low RP (-55 mV), small amplitude of AP (59 mV), slow rate of rise of AP (less than 10 V/sec), and very prolonged repolarization. This type of APs can be referred to as slow-response APs. Neither epinephrine, prostacylin-Na, nor celluline-A modified the characteristics of these slow-response APs. In group II, postoperative arrhythmias could be observed in 8 of the 10 patients.</p>\",\"PeriodicalId\":77831,\"journal\":{\"name\":\"Advances in myocardiology\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1985-01-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Advances in myocardiology\",\"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":"Advances in myocardiology","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
摘要
本文分析了38例心脏直视手术右心房电节律组织的跨膜动作电位(APs)。可以发现两种类型的ap。20例患者(ⅰ组)的APs与其他实验哺乳动物相似。ap的平均静息电位(RP)为-75 mV, 0相幅度和最大上升速率(Vmax)为- 86 mV,最大上升速率为152 V/sec,仅复极相较其他哺乳动物ap延长。肾上腺素(5.8 X 10(-6) mol /l)增加ap振幅,延长平台期,产生奇怪的驼峰ap。前列环素- na (6.7 X 10(-7)和8.7 X 10(-6) mol /l)增加Vmax。纤维素- a(一种从青蛙皮肤中提取的生物钙复合物)增加了Vmax和APs的振幅,并且与肾上腺素相似,延长了平台期。在I组,10例患者中只有1例发生术后心律失常。从另外18种制剂(II组)获得的AP具有低RP (-55 mV)、小AP振幅(59 mV)、慢AP上升速率(小于10 V/sec)和极长复极化的特点。这种类型的ap可以称为慢响应ap。肾上腺素、前列环素- na和纤维素- a都不能改变这些慢反应ap的特征。II组10例患者中有8例出现术后心律失常。
Physiological and pharmacological analysis of transmembrane action potentials of human atrial fibers.
Transmembrane action potentials (APs) of electrically paced right-atrial tissue obtained from 38 patients of corrective open-heart surgery were analyzed. Two types of APs could be found. The APs of 20 patients (group I) were similar to those of other laboratory mammals. The average resting potential (RP) and the amplitude and maximum rate of rise of phase 0 of APs (Vmax) were -75 mV, 86 mV, and 152 V/sec, respectively, only the repolarization phase being more prolonged than that of other mammalian APs. Epinephrine (5.8 X 10(-6) mole/liter) increased the amplitude of APs and prolonged the plateau phase, producing odd-looking, humped APs. Prostacyclin-Na (6.7 X 10(-7) and 8.7 X 10(-6) mole/liter) increased Vmax. Celluline-A (a biological Ca-complex obtained from frog skin) increased both Vmax and the amplitude of APs and, similar to epinephrine, prolonged the plateau phase. In group I, postoperative arrhythmias occurred in only 1 of the 10 patients. APs obtained from another 18 preparations (group II) were characterized by low RP (-55 mV), small amplitude of AP (59 mV), slow rate of rise of AP (less than 10 V/sec), and very prolonged repolarization. This type of APs can be referred to as slow-response APs. Neither epinephrine, prostacylin-Na, nor celluline-A modified the characteristics of these slow-response APs. In group II, postoperative arrhythmias could be observed in 8 of the 10 patients.