缺血再灌注損傷（IschemiareperfusioninjuryIRI）課件

1、缺血再灌注損傷（IschemiareperfusioninjuryIRI）缺血再灌注損傷（IschemiareperfusioninjuryIRI）患者：男，58歲，上午8時，起床后感到胸悶，30min后突感 心胸前區(qū)劇烈絞痛，9時入急診病房。體查：血壓75/50mmHg，意識淡漠，心率65次/min，律齊。 心電圖示度房室傳導阻滯。冠狀動脈造影：右冠狀動脈上段85%狹窄，中段78%狹窄。入院治療：立即給予阿托品、多巴胺、低分子右旋糖酐等進 行擴冠治療。上午10時靜脈點滴尿激酶。10.30分患者 出現陣發(fā)性心室顫動（室顫），立即給予除顫，到下 午13時反復發(fā)生室性心動過速、室顫，共計6次。到下

2、 午16時，經給予利多卡因、小劑量異丙腎上腺素后心 律轉為竇性，血壓平穩(wěn)，意識清楚。缺血再灌注損傷（IschemiareperfusioninjuryIRI）缺血再灌注損傷（IschemiareperfusioninjuryIRI）缺血再灌注損傷（IschemiareperfusioninjuryIRI） Usually blood reperfusion should reduce the ischemia injury. However, recent clinical observations and animal ex- periments showed that blood repe

3、rfusion sometimes indu- ces or aggravates the further reversible even irreversible cell damage, especially for a prolonged ischemia. 缺血再灌注損傷（IschemiareperfusioninjuryIRI）缺血再灌注損傷（IschemiareperfusioninjuryIRI）缺血再灌注損傷（IschemiareperfusioninjuryIRI）內皮素的作用 高能磷酸化合物缺乏 The increase free radicals, calcium ove

4、rload, neutrophils activation, play the principal roles in ischemia-reperfusion injury.缺血再灌注損傷（IschemiareperfusioninjuryIRI）缺血再灌注損傷（IschemiareperfusioninjuryIRI）O2 （O缺血再灌注損傷（IschemiareperfusioninjuryIRI）缺血再灌注損傷（IschemiareperfusioninjuryIRI） 缺血再灌注損傷（IschemiareperfusioninjuryIRI）Ca2+超載缺血再灌注損傷（Ischemia

5、reperfusioninjuryIRI）缺血再灌注損傷（IschemiareperfusioninjuryIRI）MPO：過氧化物酶缺血再灌注損傷（IschemiareperfusioninjuryIRI） 缺血再灌注損傷（IschemiareperfusioninjuryIRI）缺血再灌注損傷（IschemiareperfusioninjuryIRI）缺血再灌注損傷（IschemiareperfusioninjuryIRI）：磷脂酶A 、LT：白三烯 缺血再灌注損傷（IschemiareperfusioninjuryIRI）缺血再灌注損傷（Ischemiareperfusioninjury

6、IRI）缺血再灌注損傷（IschemiareperfusioninjuryIRI）缺血再灌注損傷（IschemiareperfusioninjuryIRI）缺血再灌注損傷（IschemiareperfusioninjuryIRI）缺血再灌注損傷（IschemiareperfusioninjuryIRI）缺血再灌注損傷（IschemiareperfusioninjuryIRI） The ischemia region could not be reperfused sufficiently after relieving the occlusion to recover the blood fl

7、ow.缺血再灌注損傷（IschemiareperfusioninjuryIRI）O2 炎癥介質炎癥介質缺血再灌注損傷（IschemiareperfusioninjuryIRI）缺血再灌注損傷（IschemiareperfusioninjuryIRI）缺血再灌注損傷（IschemiareperfusioninjuryIRI）缺血再灌注損傷（IschemiareperfusioninjuryIRI）缺血再灌注損傷（IschemiareperfusioninjuryIRI）缺血再灌注損傷（IschemiareperfusioninjuryIRI）The energy metabolism mainl

8、y focus on the generation and utilization of ATP in myocardium. In normally the ischemic injury should relieve after reperfusion recover. It is revealed that the high-energy phosphates stored in heart do not increase followed by reperfusion, instead of deplete further. That means the generation of A

9、TP is lower because the mitochondria damaged by oxygen free radicals and calcium overload. 缺血再灌注損傷（IschemiareperfusioninjuryIRI）缺血再灌注損傷（IschemiareperfusioninjuryIRI）缺血再灌注損傷（IschemiareperfusioninjuryIRI）缺血再灌注損傷（IschemiareperfusioninjuryIRI）O2O2 eO2 OH + H2O 3e3H+2eO2 H2O2 2H+4eO2 2H2O4H+2 缺血再灌注損傷（Isc

10、hemiareperfusioninjuryIRI）缺血再灌注損傷（IschemiareperfusioninjuryIRI） Reactive oxygen species (ROS) are composed by oxygen-derived free radicals (OFR) and non free radical substances, such as superoxide anion radical ( ), hydroxyl radical (), hydrogen peroxide () and singlet oxygen (1O2).2 ROSH2O2, 1O2, O

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